CN105122702B - Self-adapting data interference eliminates - Google Patents

Self-adapting data interference eliminates Download PDF

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Publication number
CN105122702B
CN105122702B CN201480020752.2A CN201480020752A CN105122702B CN 105122702 B CN105122702 B CN 105122702B CN 201480020752 A CN201480020752 A CN 201480020752A CN 105122702 B CN105122702 B CN 105122702B
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China
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interference
transmission
pay
load
useful
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CN201480020752.2A
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CN105122702A (en
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A·巴尔别里
骆涛
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Qualcomm Inc
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Qualcomm Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0047—Decoding adapted to other signal detection operation
    • H04L1/005—Iterative decoding, including iteration between signal detection and decoding operation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/3746—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35 with iterative decoding
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/3784—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35 for soft-output decoding of block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/0026—Interference mitigation or co-ordination of multi-user interference
    • H04J11/0036—Interference mitigation or co-ordination of multi-user interference at the receiver
    • H04J11/004—Interference mitigation or co-ordination of multi-user interference at the receiver using regenerative subtractive interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/0026—Interference mitigation or co-ordination of multi-user interference
    • H04J11/0036—Interference mitigation or co-ordination of multi-user interference at the receiver
    • H04J11/004—Interference mitigation or co-ordination of multi-user interference at the receiver using regenerative subtractive interference cancellation
    • H04J11/0043—Interference mitigation or co-ordination of multi-user interference at the receiver using regenerative subtractive interference cancellation by grouping or ordering the users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0047—Decoding adapted to other signal detection operation
    • H04L1/0048—Decoding adapted to other signal detection operation in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

Based on configured transmission and it is expected the resource lap between pay(useful) load and interference pay(useful) load, select interference cancellation scheme in real time.In the case where the signal quality instruction interference pay(useful) load of interference signal can be correctly decoded, codeword level interference can be performed and eliminated.When codeword level interference elimination is performed, it can be monitored to determine to decode whether interference pay(useful) load is restraining.Signal quality that can be based on interference signal or the non-convergent decoding for disturbing pay(useful) load, select other interference cancellation schemes.The iterations for the iterative decoding in being eliminated in codeword level interference can be dynamically selected.Before decoder Complete Convergence, (for example, soft bit) can be exported using decoder and eliminated to perform interference.Iterative decoding can with the multistage be performed, and for the subsequent stage soft-decision from a stage can be utilized to export come initializing decoder.

Description

Self-adapting data interference eliminates
Cross reference
Patent application claims enjoy Barbieri et al. in " Adaptive submitting, entitled on April 4th, 2014 Data Interference Cancellation " U.S. Patent application No.14/245,155 and Barbieri et al. in On April 12nd, 2013 " Methods to Enable and Enhance Data Interference submitting, entitled Cancellation " U.S. Provisional Patent Application No.61/811,626 priority, apply in this two parts applications per a It is assigned to present assignee.
Background technology
Cordless communication network is widely disposed, is sent to provide such as voice, video, grouped data, message, broadcast The various communication services of etc.These wireless networks can support multiple use by sharing available Internet resources The multi-access network at family.
Cordless communication network can include the multiple base stations that can support the communication of multiple mobile devices.In some technologies In, mobile device is referred to alternatively as access terminal, user equipment (UE), movement station etc..Mobile device can be via downlink (DL) communicated with up-link (UL) transmission with base station.Downlink (or forward link) is referred to from base station to mobile device Communication link, and up-link (or reverse link) refers to communication link from mobile device to base station.Each base station With certain coverage, it is properly termed as the overlay area of the cell.Network can include the cell of different capacity grade, To service different and potential overlapping overlay area.For example, describe to serve wider area (such as township using macrocell Village, suburb and urban area) cell.It can be disposed in family, small business, building or other finite regions less Cell.These small cells are divided into different classes, such as picocell or Femto cell.Picocell can be via directly returning Journey is connected to the network or macrocell of service provider.Femto cell generally connects via broadband connection or other media To the network of service provider.
Mobile device may be born to and from other cells in network and the interference of the transmission of mobile device. On the uplink, by the transmission from other cells and the mobile device serviced by other cells, at mobile device Inter-cell interference may occur.By the biography to and from the other mobile devices serviced by the serving cell of mobile device It is defeated, it may occur however that to the intra-cell interference of the mobile device.Similarly, base station may pass in the up-link from mobile device Bear to disturb on defeated.Mobile device and base station can include the ability for advanced interference management, and it includes interference and eliminates (IC). Some interference cancellation techniques are used for the various parameters of the transmission of interference signal dependent on identification, and using these parameters to estimate The interference signal that the signal that receives and rebuilding is sent is to carry out interference elimination.Although under some scenes, these technologies can To provide outstanding interference elimination performance, but determining when using these technologies and how to manage a variety of interference cancellation techniques In use, it is possible that some challenge.
The content of the invention
Described feature relates generally to the one or more for Adaptive interference cancellation according to various embodiments Improved systems, methods and/or devices.In certain embodiments, can based on for disturb pay(useful) load configured transmission come Using the real-time determination of IC schemes.Signal quality threshold can be calculated using configured transmission, wherein higher than signal quality threshold During value, various IC schemes are likely to successful.For example, signal quality threshold can indicate a level, wherein in the level IC scheme of the place based on error correcting code structure is likely to successful.If selected for the IC schemes based on error correcting code structure, then may be used To be monitored to the program to determine to decode whether interference pay(useful) load will succeed.Transmission phase is disturbed if based on decoding The degree of convergence measurement of association, the IC based on error correcting code structure are rendered as being non-convergent, then can stop being based on error correcting code structure IC, and alternatively run different IC schemes.For example, other IC schemes bags that can be based on signal quality threshold to use Include：Noiseless elimination, the space AF panel based on linear equalization or the interference cancellation scheme independently of coding structure.
In certain embodiments, it is determined that the order that IC schemes and/or execution eliminate for the interference of interference pay(useful) load It is middle to consider it is expected pay(useful) load and disturb the resource lap between pay(useful) load.For example, it may be possible to multiple interference signals are received, its In these signals include from it is expected that pay(useful) load has the interference pay(useful) loads of different resource overlaying horizontals.Based on lap and Processing constraint, can be to some or all ICs of the interference pay(useful) load execution based on error correcting code structure.It is based on entangling to perform The IC of error code structure and to disturbing the selection and sequence of pay(useful) load, may depend on interference pay(useful) load with it is expected pay(useful) load The amount that resource is overlapping or signal energy is overlapping.Interference pay(useful) load is successfully solved in addition, selection and sequence may depend on The probability of code.
When performing the IC based on error correcting code structure, can be dynamically selected for being iterated solution to interference pay(useful) load The iterations of code.In certain embodiments, before decoder Complete Convergence, decoder can be used to export (for example, soft ratio It is special) eliminated to perform interference.The optimization of decoding iteration can be based on the interference signal quality of pay(useful) load, code check, remaining do Disturb, the signal quality of serving cell transmission and/or the external information as caused by decoder.In certain embodiments, can be with pin Successive ignition decoding is performed to an interference pay(useful) load.The soft-decision output for the first stage can be stored, and subsequent Stage on exported using the soft-decision that is stored of first stage to initialize iterative decoder.
Some embodiments are directed to a kind of method, and methods described includes：Reception includes serving cell transmission and one or more Disturb the signal of transmission；Configured transmission of the identification for the first interference transmission in one or more of interference transmission；At least Identified configured transmission is based in part on to calculate the signal quality threshold associated with the described first interference transmission；Determine institute State the signal quality metrics of the first interference transmission；And it is based at least partially on the signal quality threshold and first interference The signal quality metrics of transmission, it is determined that the interference cancellation scheme for the described first interference transmission.It is one or more of Interference transmission can be one or more of serving cell transmission for the adjacent cell transmission or interference disturbed.The signal Quality threshold can be Signal to Interference plus Noise Ratio (SINR) threshold value, and the signal quality metrics can be described first Disturb the SINR of transmission.For example, the interference cancellation scheme can be the space AF panel based on linear equalization, based on error correction Code structure interference cancellation scheme or independently of the interference cancellation scheme of coding structure or its combination.
In certain embodiments, methods described includes：Determine that the serving cell transmission and described first disturbs transmission Resource lap.The interference cancellation scheme can be at least partially based on identified resource lap to determine. In some embodiments, methods described includes：Signal quality metrics based on the described first interference transmission exceed the signal quality Threshold value, the codeword level interference performed for the described first interference transmission eliminate (CWIC).Perform and passed for the described first interference Defeated CWIC can include：Perform the iterative decoding to the described first interference transmission；Monitor the degree of convergence degree of the iterative decoding Amount；The iterations of the degree of convergence measurement and the iterative decoding is based at least partially on, determines that the degree of convergence is estimated；And work as The degree of convergence estimation indicates that the iterative decoding not in convergence, stops the CWIC of the first interference transmission.The side Method can include：After CWIC is stopped, the symbol rank interference performed for the described first interference transmission eliminates (SLIC).Repeatedly Generation decoding can include decoding the turbo of the described first interference transmission.The degree of convergence measurement can be based on changing described The log-likelihood ratio calculated during generation decoding.
In certain embodiments, methods described includes：The signal quality metrics based on the described first interference transmission do not have The signal quality threshold is had more than, performs the SLIC for the described first interference transmission.Methods described can include：Based on institute The signal quality metrics for stating the first interference transmission are not above secondary signal quality threshold, do not perform dry for described first The interference for disturbing transmission eliminates.Identification can include for the configured transmission of the described first interference transmission：Received at UE The configured transmission being intended in the control message for the UE, blind decoding disturb associated descending of transmission with described first Link control message (DCI), or its combination.For example, the configured transmission can be the code check of the first interference transmission, institute The Space Program, the order of the transmission associated with the described first interference transmission, first interference for stating the first interference transmission are transmitted Transport block size, it is described first interference transmission redundancy versions or its combination.Received signal can be predetermined The multiple symbols received over the plurality of subcarriers in period.Received signal can be included in and the serving cell transmission The symbol received in associated subframe.
In certain embodiments, methods described includes：The second interference detected in one or more of interference transmission passes It is defeated；It is determined that for performing the order that interference eliminates for the described first interference transmission and the described second interference transmission；And base In identified order, perform for the CWIC of one in the described first interference transmission or the second interference transmission.Really It is fixed described for disturbing transmission and the described second interference to transmit and disturb the order eliminated to include to perform for described first： Determine the first interference transmission and the first overlapped resource amount of the serving cell transmission；Determine it is described second interference transmission with Second overlapped resource amount of the serving cell transmission；And by the first overlapped resource amount and the second overlapped resource amount It is compared.It is determined that described be used to transmit with the described second interference transmission to perform the suitable of interference elimination for the described first interference Sequence can include：Determine the first interference transmission and the first amount of the overlapped signal energy of the serving cell transmission；It is determined that The second interference transmission and the second amount of the overlapped signal energy of the serving cell transmission；And by the overlapped signal energy First amount of amount is compared with the second amount of the overlapped signal energy.It is determined that described be used to transmit for the described first interference It can be that first interference of being successfully decoded based on estimation passes that the order eliminated to perform interference is transmitted with the described second interference The probability of defeated and described second interference transmission.In certain embodiments, the money that CWIC corresponds to the serving cell transmission is performed The part in source.Methods described can include the remainder to the resource of the serving cell transmission, perform different Interference cancellation scheme.
Some embodiments are directed to a kind of method, and methods described includes：Reception includes serving cell transmission and one or more Disturb the signal of transmission；Based on one or more iterative parameters, it is determined that for dry in one or more of interference transmission Disturb the iterations that transmission is iterated decoding；And perform the iteration of the identified iterations for the interference transmission Decoding.One or more of interference transmission can be in the adjacent cell transmission of interference or the serving cell transmission of interference It is one or more.Methods described can include：After identified iterations, non-convergent interference transmission soft-decision is produced Output.
In certain embodiments, methods described includes：Based on the non-convergent interference transmission soft-decision output, generation is estimated The encoded interference transmission of meter；And estimated encoded interference transmission is deleted from received signal.The side Method can include：The non-convergent interference transmission soft-decision output after iterations determined by being stored in；To being connect The signal of receipts performs at least one extra transmission and eliminates operation；And eliminate operation at least one extra transmission Afterwards, the extra iterative decoding to the interference transmission is performed, wherein, soft-decision-value is initialised for the non-receipts to being stored The interference transmission soft-decision output held back carries out the extra iterative decoding.To the described at least one extra of received signal Transmission eliminate operation can include：The iterative decoding to the serving cell transmission is performed, it is small to produce non-convergent service Area's soft-decision output；And exported based on the non-convergent serving cell soft-decision, from received signal described in deletion The estimation of encoded serving cell transmission.
The non-convergent interference transmission soft-decision output can be the logarithm of the iterative decoding of the interference transmission Likelihood ratio (LLR).With in order to realize reliable decoding compared with predetermined iterations, identified iterations can be lower. Compared with the iterations for being decoded to the serving cell transmission, identified iterations can be lower.For example, One or more of iterative parameters can be the configured transmission associated with the interference transmission, the signal of the interference transmission Measurement, the signal metric of the signal metric of the serving cell transmission, received signal, decoding sequential are measured, received Signal in detect interference transmission quantity or the iterative decoding the degree of convergence measurement or its combination.It is described to change Generation decoding can include decoding the turbo of the interference transmission.Received signal can be included in predetermined time period The multiple symbols received over the plurality of subcarriers.It is determined that the iterations for the iterative decoding can be at least partly Period and the predetermined time period of the ground based on iteration each time.
Some embodiments are directed to a kind of device, and described device includes：For receive include serving cell transmission and one or The unit of the signal of multiple interference transmission；For identifying for the first interference transmission in one or more of interference transmission The unit of configured transmission；Calculated for being based at least partially on identified configured transmission related to the described first interference transmission The unit of the signal quality threshold of connection；For the unit for the signal quality metrics for determining the first interference transmission；And it is used for The signal quality metrics of the signal quality threshold and the first interference transmission are based at least partially on, it is determined that being used for institute State the unit of the interference cancellation scheme of the first interference transmission.Described device can include：For determining the serving cell transmission It can be at least partially based on the unit of the resource lap of the described first interference transmission, and the interference cancellation scheme Identified resource lap determines.
In certain embodiments, described device includes：For the signal quality degree based on the described first interference transmission Amount exceedes the signal quality threshold, performs the unit of the CWIC for the described first interference transmission.In certain embodiments, institute The unit for performing the CWIC for the described first interference transmission is stated, performs the iterative decoding to the described first interference transmission, The degree of convergence measurement of the iterative decoding is monitored, is based at least partially on the degree of convergence measurement and the iteration of the iterative decoding Number determines that the degree of convergence is estimated, and when degree of convergence estimation indicates the iterative decoding in convergence, termination institute State the CWIC of the first interference transmission.
Described device can include：Institute is not above for the signal quality metrics based on the described first interference transmission Signal quality threshold is stated, performs the unit of the SLIC for the described first interference transmission.In certain embodiments, described device bag Include the unit for detecting the second interference transmission in one or more of interference transmission；It is dry for described first for determining Transmission and the described second interference transmission are disturbed to perform the unit for the order that interference eliminates；And for based on identified order come Perform the unit for the CWIC of one in the described first interference transmission or the second interference transmission.It is described to be used to determine The unit for the order that interference eliminates is performed for the described first interference transmission and the described second interference transmission, can be based on described The overlapped resource amount or overlapping signal energy of first interference transmission and the second interference transmission with the serving cell transmission The amount of amount, to determine the order eliminated for performing interference.It is described to be used to determine for the described first interference transmission and described the Two interference transmission come perform interference eliminate order unit, can based on estimation be successfully decoded it is described first interference transmission and The probability of the second interference transmission, to determine the order for being used for execution interference and eliminating.
Some embodiments are directed to a kind of device, and described device includes：For receive include serving cell transmission and one or The unit of the signal of multiple interference transmission；For based on one or more iterative parameters, it is determined that for one or more of Interference transmission in interference transmission is iterated the unit of the iterations of decoding；And transmitted for performing for the interference Identified iterations iterative decoding unit.Described device can include being used for based in identified iterations Non-convergent interference transmission soft-decision output caused afterwards, generate the unit of the encoded interference transmission of estimation；And use In the unit that estimated encoded interference transmission is deleted from received signal.Described device can include being used to store The unit of non-convergent interference transmission soft-decision output after identified iterations；For being held to received signal At least one extra transmission of row eliminates the unit of operation；And for eliminating operation at least one extra transmission Afterwards, the unit of the extra iterative decoding to the interference transmission is performed, wherein, soft-decision-value is initialised for being stored Non-convergent interference transmission soft-decision output carry out the extra iterative decoding.
Some embodiments are directed to a kind of computer program product for Adaptive interference cancellation, the computer program production Product include computer-readable medium, and the computer-readable medium includes being used to perform the code operated below：Reception includes clothes Cell transmission of being engaged in and the signal of one or more interference transmission；First interference of the identification for one or more of interference transmission The configured transmission of transmission；It is associated with the described first interference transmission to calculate to be based at least partially on identified configured transmission Signal quality threshold；Determine the signal quality metrics of the first interference transmission；And it is based at least partially on the signal matter The signal quality metrics of threshold value and the first interference transmission are measured, it is determined that the interference for the described first interference transmission eliminates Scheme.
The computer-readable medium can include being used to determine the serving cell transmission and the first interference transmission Resource lap code.In certain embodiments, the interference cancellation scheme is at least partially based on identified money Source lap determines.The computer-readable medium can include being used for the signal based on the described first interference transmission Quality metric exceedes the signal quality threshold, performs the code of the CWIC for the described first interference transmission.The computer Computer-readable recording medium can include being used to perform the code operated below：Perform the iterative decoding to the described first interference transmission；Monitoring The degree of convergence measurement of the iterative decoding；It is based at least partially on the degree of convergence measurement and the iteration time of the iterative decoding Number, determine that the degree of convergence is estimated；And when degree of convergence estimation indicates the iterative decoding not in convergence, it is dry to stop described first Disturb the CWIC of transmission.In certain embodiments, the computer-readable medium includes being used to perform the code operated below：Detection The second interference transmission in one or more of interference transmission；It is determined that for for the described first interference transmission and described second Interference transmission disturbs the order eliminated to perform；And based on identified order, perform for the described first interference transmission or The interference of the codeword level of one in second interference transmission described in person eliminates (CWIC).
Some embodiments are directed to a kind of computer program product for Adaptive interference cancellation, the computer program production Product include computer-readable medium, and the computer-readable medium includes being used to perform the code operated below：Reception includes clothes Cell transmission of being engaged in and the signal of one or more interference transmission；Based on one or more iterative parameters, it is determined that for described one Interference transmission in individual or multiple interference transmission is iterated the iterations of decoding；And perform for the interference transmission The iterative decoding of identified iterations.The computer-readable medium can include being used to perform the code operated below： Based on the caused non-convergent interference transmission soft-decision output after identified iterations, the encoded of estimation is generated Interference transmission；And estimated encoded interference transmission is deleted from received signal.The computer-readable medium It can include being used to perform the code operated below：The non-convergent interference after iterations determined by being stored in passes Defeated soft-decision output；At least one extra transmission is performed to received signal and eliminates operation；And at least one After extra transmission eliminates operation, the extra iterative decoding to the interference transmission is performed, wherein, soft-decision-value is initial Change and carry out the extra iterative decoding for the non-convergent interference transmission soft-decision output to being stored.
Some embodiments are directed to a kind of equipment for performing Adaptive interference cancellation, the equipment include processor and with The memory of the processor telecommunication.The memory can include what can be operated below by the computing device to realize Instruction：Receiving includes the signal of serving cell transmission and one or more interference transmission；Identification is for one or more of dry Disturb the configured transmission of the first interference transmission of transmission；Identified configured transmission is based at least partially on to calculate and described first The associated signal quality threshold of interference transmission；Determine the signal quality metrics of the first interference transmission；And at least partly Signal quality metrics of the ground based on the signal quality threshold and the first interference transmission, it is determined that being passed for the described first interference Defeated interference cancellation scheme.
In certain embodiments, the memory includes that the serving cell can be determined by the computing device The instruction of the resource lap of transmission and the described first interference transmission.The interference cancellation scheme can be at least partially based on Identified resource lap determines.In certain embodiments, the memory can include being held by the processor Row exceedes the signal quality threshold for the signal quality metrics based on the described first interference transmission, performs and is directed to described the The CWIC of one interference transmission instruction.The memory can include the finger that can be operated below by the computing device to realize Order：Perform the iterative decoding to the described first interference transmission；Monitor the degree of convergence measurement of the iterative decoding；At least part ground In degree of convergence measurement and the iterations of the iterative decoding, determine that the degree of convergence is estimated；And when the degree of convergence is estimated to indicate The iterative decoding stops the CWIC of the first interference transmission not in convergence.
In certain embodiments, the memory includes to be transmitted based on the described first interference by the computing device The signal quality metrics be not above the signal quality threshold, perform the finger of the SLIC for the described first interference transmission Order.The memory can include the instruction that can be operated below by the computing device to realize：Detect one or more The second interference transmission in individual interference transmission；It is determined that for being held for the described first interference transmission and the described second interference transmission The order that row interference eliminates；And based on identified order, perform for the described first interference transmission or described second dry Disturb the CWIC of one in transmission.It is identified to be used to perform the order that interference eliminates, can be passed based on the described first interference Defeated and described second interference transmission and the overlapped resource amount of the serving cell transmission or the amount of overlapping signal energy.Institute is really Fixed is used to perform the order eliminated for the interference of the described first interference transmission and the described second interference transmission, can be based on The probability that the first interference transmission and the described second interference transmission is successfully decoded of estimation.
Some embodiments are directed to a kind of equipment for performing Adaptive interference cancellation, the equipment include processor and with The memory of the processor telecommunication.The memory can include what can be operated below by the computing device to realize Instruction：Receiving includes the signal of serving cell transmission and one or more interference transmission；Based on one or more iterative parameters, really The fixed iterations for being used to be iterated the interference transmission in one or more of interference transmission decoding；And perform and be directed to The iterative decoding of the identified iterations of the interference transmission.The memory can include can be by the computing device To realize the instruction of following operation：Based on after identified iterations it is caused it is non-convergent interference transmission soft-decision it is defeated Go out, generate the encoded interference transmission of estimation；And estimated encoded interference is deleted from received signal and is passed It is defeated.The memory can include the instruction that can be operated below by the computing device to realize：Determined by being stored in repeatedly The non-convergent interference transmission soft-decision output after generation number；At least one extra biography is performed to received signal It is defeated to eliminate operation；And after at least one extra transmission eliminates operation, perform to the extra of the interference transmission Iterative decoding, wherein, soft-decision-value be initialised for stored non-convergent interference transmission soft-decision output carry out The extra iterative decoding.
Brief description of the drawings
By referring to following accompanying drawing, can obtain for the property of the present invention and further understanding for advantage.In accompanying drawing In, similar part or feature have identical reference.In addition, all parts of same type can be by accompanying drawing mark Made a distinction after note plus dash and for distinguishing the second mark of similar component.If it is used only in the description First reference, the then description are applicable to any one like with the reference of identical first, without The reference of pipe second.
Fig. 1 is the schematic diagram for the example for showing the wireless communication system according to various embodiments；
Fig. 2 is the schematic diagram according to the wireless communication system for Adaptive interference cancellation of various embodiments；
Fig. 3 is the schematic diagram for the example for showing the downlink frame structure that can be used in a wireless communication system；
Fig. 4 is the timing diagram for showing the exemplary sequential for the transmission under the environment in Fig. 2；
Fig. 5 is the block diagram according to the example system for Adaptive interference cancellation of various embodiments；
Fig. 6 shows the side for being used to determine the interference cancellation scheme for interference transmission in real time according to various embodiments Method；
Fig. 7 is shown according to various embodiments for determining the side of interference cancellation scheme based on signal quality threshold Method；
Fig. 8 is shown to be used to monitor to perform code word level using the degree of convergence for interference transmission according to various embodiments Other interference elimination method；
Fig. 9 is the timing diagram for showing the exemplary sequential for the transmission under the environment in Fig. 2；
Figure 10 shows the interference cancellation scheme for being used to determine in real time for multiple interference transmission according to various embodiments Method；
Figure 11 is to show the interference having to the dynamic select of the iteration for iterative decoding according to various embodiments The timing diagram of elimination；
Figure 12 is shown to be used for the dry of the dynamic select to the iteration for iterative decoding according to various embodiments The method for disturbing elimination；
Figure 13 is shown is used for the code with the dynamic select to the iteration for iterative decoding according to various embodiments Word rank interference elimination method；
Figure 14 is shown to be used to determine in real time for disturbing setting for the interference cancellation scheme of transmission according to various embodiments It is standby；
Figure 15 is shown is used for the code with the dynamic select to the iteration for iterative decoding according to various embodiments The equipment that the interference of word rank eliminates；
Figure 16 is the block diagram for the system for including base station and mobile device；
Figure 17 is the block diagram according to the mobile device for being arranged to Adaptive interference cancellation of various embodiments；
Figure 18 shows the frame of the communication system that can be arranged to Adaptive interference cancellation according to various embodiments Figure.
Embodiment
The various aspects of present disclosure provide the Adaptive interference cancellation according to various embodiments.In some embodiments In, can the configured transmission based on the pay(useful) load for interference, to use the real-time determination of IC schemes.Transmission ginseng can be used Count to calculate signal quality threshold, wherein when higher than the signal quality threshold, various IC schemes are likely to be successful.Example Such as, signal quality threshold can indicate a level, and at the horizontal place, the IC schemes based on error correcting code structure are likely to success 's.If selected for the IC schemes based on error correcting code structure, then it can be monitored to determine the effectively negative of decoding interference Whether load will succeed.Measured if based on the degree of convergence associated with decoding interference transmission, the IC based on error correcting code structure is in Now to be non-convergent, then it can stop the IC based on error correcting code structure, and alternatively run different IC schemes.For example, can Included with other IC schemes used by based on signal quality threshold：Noiseless elimination, the space interference suppression based on linear equalization System or the interference cancellation scheme independently of coding structure.
In certain embodiments, it is determined that IC schemes and/or execution disturb the suitable of elimination for the pay(useful) load of interference The overlapping amount of resource between the pay(useful) load of desired pay(useful) load and interference is considered in sequence.For example, it may be possible to receive multiple dry Signal is disturbed, wherein these signals include the interference pay(useful) load from desired pay(useful) load with different resource overlaying horizontals. Constrained based on overlapping amount and processing, can be to some or all ICs of the interference pay(useful) load execution based on error correcting code structure. In order to perform the IC based on error correcting code structure and to disturbing the selection and sequence of pay(useful) load, may depend on interference pay(useful) load with The amount that the resource of desired pay(useful) load is overlapping or signal energy is overlapping.In addition, selection and sequence are depending on effective to disturbing Load the probability being successfully decoded.
When performing the IC based on error correcting code structure, changing for iterative decoding interference pay(useful) load can be dynamically selected Generation number.In certain embodiments, before decoder Complete Convergence, (for example, soft bit) can be exported using decoder and come Interference is performed to eliminate.The optimization of decoding iteration can be signal quality, code check, residual interference, clothes based on interference pay(useful) load The signal quality for cell transmission of being engaged in and/or the external information as caused by decoder.In certain embodiments, one can be directed to Pay(useful) load is disturbed to perform successive ignition decoding.The soft-decision output of first stage can be stored, and it is sharp on the subsequent stage Exported with the soft-decision of the storage of first stage to initialize iterative decoder.
Technique described herein can be used for various wireless communication systems, such as, cellular wireless system, reciprocity channel radio Letter, wireless local access network (WLAN), self-organizing (ad hoc) network, satellite communication system and other systems.Term " system " " network " is generally interchangeably used.These wireless communication systems can use such as CDMA (CDMA), time division multiple acess (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA) and/or other wireless technologys it The various wireless communication technologys of class.Generally, according to the one or more channel radios for being referred to as wireless access technology (RAT) The standardization of letter technology is realized to carry out radio communication.The wireless communication system or network for realizing wireless access technology are referred to alternatively as Radio Access Network (RAN).
Example using the wireless access technology of CDMA technology includes CDMA 2000, general land wireless access (UTRA) Etc..CDMA2000 covers IS-2000, IS-95 and IS-856 standard.IS-2000 versions 0 and A are commonly known as CDMA 2000 1X, 1X etc..IS-856 (TIA-856) is commonly known as the 1xEV-DO of CDMA 2000, HRPD (HRPD) etc.. UTRA includes wideband CDMA (WCDMA) and other CDMA deformation.The example of TDMA system includes global system for mobile communications (GSM) various realizations.Ultra-Mobile Broadband (UMB) is included using the example of OFDM and/or OFDMA wireless access technology, drilled UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, the Flash-OFDM entered Etc..UTRA and E-UTRA is Universal Mobile Telecommunications System (UMTS) part.3GPP Long Term Evolutions (LTE) and improved LTE (LTE-A) is the UMTS redaction using E-UTRA.In the group from entitled " third generation partner program " (3GPP) UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in the document knitted.From entitled " third generation partner program CDMA2000 and UMB are described in the document of 2 " (3GPP2) tissue.Techniques described herein can be used for mentioned above System and wireless technology and other systems and wireless technology.
Therefore, description below provides example, and be not to illustrated in claims scope, applicability or The limitation of person's configuration.Function that can be to the key element of discussion on the basis of the spirit and scope of present disclosure are not departed from and row Row are changed.Each embodiment can take the circumstances into consideration to omit, substitute or increase various processes or part.For example, can according to Described order different performs the method for description, and each step can be increased, omitted or group Close.In addition, it can be combined on the feature described by some embodiments in other embodiments.In addition, in this specification and power In sharp claim, such as " at least one in A, B or C ", " at least one in A, B and C ", " one or more in A, B and C It is individual ", " one or more of A, B or C " and " A, B, C or its any combination " etc combination, including A, B and/or C Any combination, and it can include multiple A, multiple B or multiple C.Specifically, such as " at least one in A, B or C It is individual ", " at least one in A, B and C ", " one or more of A, B and C ", " one or more of A, B or C " and The combination of " A, B, C or its any combination " etc, can be only A, only B, only C, A and B, A and C, B and C or A and B and C, wherein, arbitrary this combination can include one or more of A, B or C member.
Referring first to Fig. 1, the figure shows the example of wireless communication system 100.System 100 includes base station (or cell) 105th, communication equipment 115 and core net 130.In various embodiments, base station 105 can be in base station controller (not shown) Communicated under control with communication equipment 115, base station controller can be core net 130 or a part for base station 105.Base Standing 105 can be by back haul link 132 and the interactive control information of core net 130 and/or user data.Back haul link 132 can be with It is wired backhaul (for example, copper cash, optical fiber etc.) and/or wireless backhaul link (for example, microwave etc.).In embodiment In, base station 105 can be communicated on back haul link 134 directly with one another or indirectly, wherein back haul link 134 Can be wired communications links or wireless communication link.System 100 can support multiple carrier waves (ripple of different frequency Shape signal) on operation.Multicarrier transmitter can simultaneously send modulated signal over a number of carriers.It is for example, each Communication link 125 can be the multi-carrier signal being modulated according to various wireless technologys described above.It is each modulated Signal can be transmitted on different carrier waves, and control information can be carried (for example, reference signal, control channel Etc.), Overhead, data etc..
Base station 105 via one pair or can overpay antenna for base station, wirelessly be communicated with equipment 115.The website of base station 105 In each base station can be corresponding overlay area 110 provide communication overlay.In certain embodiments, base station 105 can be with Be referred to as base station transceiver, wireless base station, access point, transceiver, Basic Service Set (BSS), extended service set (ESS), Node B, eNodeB (eNB) or certain other appropriate term.The overlay area 110 of base station can be divided into composition, and this covers The sector of the only a part (not shown) of cover area.System 100 can include different types of base station 105 (for example, grand base Stand, micro-base station, femto base station or femto base station).There may be overlapping overlay area for different technologies.
Communication equipment 115 is dispersed among in whole wireless network 100, and each equipment can be static, also may be used To be mobile.Communication equipment 115 can also be referred to as movement station, subscriber station, mobile unit, use by those of ordinary skill in the art Family unit, radio-cell, remote unit, mobile device, wireless device, Wireless Telecom Equipment, remote equipment, mobile subscriber station, Access terminal, mobile terminal, wireless terminal, remote terminal, hand-held device, user agent, user equipment, mobile client, visitor Family end or certain other appropriate term.Communication equipment 115 can be cell phone, personal digital assistant (PDA), wireless tune Modulator-demodulator, Wireless Telecom Equipment, handheld device, tablet PC, laptop computer, wireless phone, WLL (WLL) stand etc..Communication equipment can be communicated with macro base station, femto base station, femto base station, relay base station etc..
Transmission link 125 shown in network 100 can include from mobile device 115 to the up-link of base station 105 (UL) transmit, and/or downlink (DL) transmission from base station 105 to mobile device 115.Downlink transmission can also be claimed For forward link transmissions, and up-link transmission is also referred to as rl transmission.
In embodiment, system 100 is LTE/LTE-A networks.In LTE/LTE-A networks, usually using term evolution Type node B (eNB) and user equipment (UE) describe base station 105 and communication equipment 115 respectively.System 100 can be isomery LTE/LTE-A networks, wherein, different types of eNB provides the covering of various geographic areas.For example, each eNB 105 can be with Communication overlay is provided for macrocell, picocell, Femto cell or other types of cell.Generally, macrocell covering phase To larger geographic area (for example, the several kilometers of radius), and its permission has the UE energy of service subscription with network provider Access without restriction.Generally, picocell and Femto cell cover relatively small geographic area (for example, building, family Front yard etc.).ENB for macrocell can be referred to as grand eNB.ENB for picocell can be referred to as pico- eNB, with And femto eNB or family eNB can be referred to as the eNB of Femto cell.ENB can support it is one or more (for example, Two, three, four etc.) cell.
, can as UE 115 is typically operated to promote high moving operation using the internal electric source of such as compact battery etc To be disposed using the tactic of picocell and Femto cell to reduce mobile device power consumption.It is, for example, possible to use femto Cell, otherwise can not may experience abundance service or can not even experience it is any service (for example, due to capacity limit, Bandwidth limitation, signal fadeout, signal blocks etc.) region in service is provided, so as to allow UE 115 reduce search time, with Just transmission power is reduced, reduces launch time etc..Therefore, when UE 115 is serviced by picocell or Femto cell When, it typically lies in allows generally for UE 115 can be with reduction with the serving cell relatively close location, this situation Transmission power is communicated.
Evolved packet system (EPS) 100 can be referred to as according to the communication system 100 of LTE/LTE-A network architecture. EPS 100 can include one or more UE 115, Evolved UMTS Terrestrial Radio Access Network (E-UTRAN), evolution packet Core (EPC) (for example, core net 130), home subscriber server (HSS) and the IP of operator services.EPS 100 can be used Other wireless access technologys are interconnected with other access networks.For example, EPS 100 can with the network based on UTRAN and/or Network based on CDMA is interconnected.In order to support UE 115 mobility and/or load balance, EPS 100 can support UE 115 switching between source eNB 105 and target eNB 105.EPS 100 can support eNB 105 and/or identical RAT (examples Such as, other E-UTRAN networks) base station between RAT in switch, and between RAT between eNB and/or different RAT base station Switching (for example, E-UTRAN to CDMA etc.).EPS 100 can provide packet-switched services, still, such as the common skill in this area Art personnel are readily appreciated by, and can be expanded to through each conception of species given by present disclosure and provide circuit switched service Network.
E-UTRAN can include eNB 105, and provide user plane and control plane the agreement end for UE 115 Only.Any one in eNB 105 can be connected to other eNB via back haul link 132 or 134 (for example, X2 interface etc.) 105.ENB 105 can be that UE 115 provides the access point for being directed to EPC 130.ENB 105 can pass through (the example of back haul link 132 Such as, S1 interfaces etc.) it is connected to EPC 130.It is real that logical node in EPC 130 can include one or more mobile management Body (MME), one or more gateways and one or more packets data network (PDN) gateway (not shown).It is logical Often, MME can provide carrying and connection management.All User IP packets, the gateway can be transmitted by gateway Itself may be coupled to PDN Gateway.PDN Gateway can provide the distribution of UE IP address and other functions.PDN Gateway can connect It is connected to the IP services of IP network and/or operator.These logical nodes can be implemented in physical node respectively, Huo Zheyi Individual or multiple logical nodes can be combined in single physical node.The IP services of IP network/operator can include interconnection Net, Intranet, IP multimedia subsystem (IMS) and/or packet switch (PS) stream service.
For example, UE 115 can be configured as by multiple-input and multiple-output (MIMO), coordinate multipoint (CoMP) or other Scheme, collaboratively communicated with multiple eNB 105.MIMO technology uses overpaying on the plurality of antennas and/or UE on base station Antenna, to send multiple data flows using multi-path environment.Each data flow can be referred to as one " layer ", and communication chain " order " on road can indicate the quantity of the floor for communication.CoMP includes entering Mobile state for the transmission to multiple eNB and reception Coordinate, to improve UE overall transfer quality, and increase network and spectrum utilization.Generally, CoMP technologies use back haul link 132 and/or 134 realize the communication between base station 105, to coordinate control plane and user plane communication for UE 115.
The communication network of some being adapted in various the disclosed embodiments, can be carried out according to layered protocol stack The packet-based network of operation.In user plane, the communication at carrying or PDCP (PDCP) layer Can be IP-based.Wireless spread-spectrum technology (RLC) layer can perform packet segmentation and restructuring, to carry out on logical channels Communication.Media access control (MAC) layer can be handled with execution priority, and logic channel is multiplexed into transmission channel.MAC layer The re-transmission at MAC layer can also be provided using hybrid automatic repeat-request (HARQ) technology, to ensure reliable data transfer. In the control plane, wireless heterogeneous networks (RRC) protocol layer can provide is used for user plane data between UE and network RRC establishment of connections, configuration and maintenance.At physical layer, transmission channel can be mapped to physical channel.
Downlink physical channel can include at least one in the following：Physical Broadcast Channel (PBCH), physics Downlink control channel (PDCCH), physics HARQ indicator channel (PHICH) and physical down link sharing channel (PDSCH).The control format designator (CFI) carried in physical control format indicator channel (PCFICH) can be with indicator To the quantity of the symbol in the PDCCH of specific downlink subframe.Uplink physical channel can include physical uplink chain It is at least one in road control channel (PUCCH) and physical uplink link shared channels (PUSCH).PDCCH can carry descending Link control message (DCI), down link control information can indicate to be directed to UE data transfer on PDSCH, and to UE UL grant of resources for PUSCH is provided.Control is sent on the resource block that UE can be distributed in control section on PUCCH Information.Only data are sent on the resource block that UE can be distributed in data segment on PUSCH or send data and control Both information.
LTE/LTE-A uses OFDM (OFDMA) on the uplink, and is carried on uplink using single Ripple frequency division multiple access (SC-FDMA).OFDMA and/or SC-FDMA carrier waves can be divided into multiple (K) orthogonal subcarrier, its In these subcarriers be also commonly referred to as tone, frequency range etc..Each subcarrier can be modulated using data.It is adjacent Interval between subcarrier can be fixed, and the entire quantity (K) of subcarrier may depend on system bandwidth.It is for example, right In the corresponding system bandwidth (it has guard band) of 1.4,3,5,10,15 or 20 megahertzs (MHz), K can be respectively equal to 72, 180th, 300,600,900 or 1200, wherein the subcarrier spacing of 15 KHzs (KHz).Furthermore, it is possible to system bandwidth is divided into Subband.For example, subband can cover 1.08MHz, and there may be 1,2,4,8 or 16 subband.Carrier wave can use FDD (for example, using paired frequency spectrum resource) or TDD operate (for example, using azygous frequency spectrum resource) to send two-way Letter.The frame structure (for example, frame structure Class1) for FDD and the frame structure for TDD can be defined (for example, frame structure type 2)。
Fig. 2 is the schematic diagram for the wireless communication system 200 for being used for Adaptive interference cancellation according to various embodiments.For example, System 200 can be with the aspect of the system 100 shown in depiction 1.System 200 can include eNB 105-a, eNB 105-b With eNB 105-c, and UE 115-a, UE 115-b and UE 115-c.System 200 depicts serving cell transmission 225 and done Disturb transmission 230.For example, UE 115-a can be serviced by eNB 105-a, and service eNB 105-a can for Data are sent in UE 115-a transmission 225-a.In system 200, eNB 105-b can be used with transmitting 225-a identicals Frequency resource sends data in 225-b is transmitted to UE 115-b.ENB 105-b transmission 225-b may cause by UE 115- The interference transmission 230-b-a that a is received.In addition, transmission 225-a, 225-b and 225-c can cause to be directed to UE 115-b and UE 115-c interference transmission 230-a-b, 230-c-a, 230-b-c and 230-c-b.Fig. 2 depicts downlink serving cells transmission Transmitted with interference.But for UE transmission is received at eNB 105, similar interference can occur on uplink and ask Topic.
UE 115 and eNB 105 can use the various technologies for advanced interference management.These technologies include using The AF panel (IS) of MMSE AF panels, the Multiuser Detection using the joint ML detections for desired signal and interference signal (MUD), the space AF panel based on linear equalization, the interference of symbol rank eliminate (SLIC) and codeword level interference elimination (CWIC)。
In SLIC, Space Program and modulation format based on use carry out the ratio that the most probable of estimated disturbance signal is sent It is special.Afterwards, the estimation of interference signal is rebuild using estimated bit, Space Program and modulation format, afterwards, from being received To signal in subtract estimated interference signal.As it is used herein, SLIC is generally referred to independently of the dry of coding structure Disturb cancellation scheme, however it is not limited to some specific transport-type, modulation format or Space Program.
CWIC uses the Error Correction of Coding for being applied to interference data channel, so as to estimated disturbance signal, so as to realize that interference disappears Remove.For example, in LTE, PDSCH is turbo codings, wherein, for the parameter required for decoding via the DCI in PDCCH Be provided to PDSCH pay(useful) loads be intended to for UE.In CWIC, UE obtains to be intended to for the dry of different UE for decoding One or more parameters of PDSCH transmission are disturbed, and decode the PDSCH transmission of the interference.Then, UE is according to the PDSCH transmission Decoded bit rebuilds the interference signal, and subtracts the signal of the reconstruction from received signal.In some situations Under (for example, reliable turbo decodings, high RST and interference plus noise (SINR) etc.), with independent of interference is transmitted into Other interference cancellation techniques (for example, SLIC etc.) of row decoding are compared, and the signal rebuild in CWIC is probably more reliable. As it is used herein, CWIC generally refer to consider interference signal error correcting code structure interference cancellation scheme, but itself and it is unlimited In certain specific coding techniques, transport-type, modulation format or Space Program.
For example, being used for CWIC to decode PDSCH pay(useful) loads, UE uses code check or transport block size (TBS), physics Resource block (PRB) distributes and redundancy versions (RV).UE can via network signal, with interference PDSCH pay(useful) loads it is associated DCI blind Detecting or decoding, to obtain these configured transmissions.In network provides the system environments of these configured transmissions, UE Receive the decoded information of the PDSCH pay(useful) loads for being intended to other UE for interference can be brought to UE.For example, network can This information is provided in broadcast or control message.
TBS, PRB are distributed and RV blind Detecting is similar to the blind Detecting of the modulation format for being directed to SLIC and Space Program.So And due to the quantity that the possibility of PDSCH transmission combines, TBS, PRB are distributed and RV blind Detecting can be computation-intensive.
Furthermore, it is possible to the decoding of the DCI for other UE is intended to perform by the technology similar to blind decoding.With TBS, PRB distribution is compared with RV blind Detecting, and the technology can be less computation-intensive.However, blind decoding is intended to for other UE DCI, the decoding incorrect once in a while of grant of resources may be caused.In these examples, DCI can be construed to indicator pair by UE With the unmatched UE of PDSCH pay(useful) loads of reality grant of resources.Tasting for CWIC is performed using incorrect grant of resources Examination, will cause the failure of the decoding to PDSCH pay(useful) loads, and invalid CWIC for interference eliminates may be caused defeated Go out, or even increase the interference for the expectation pay(useful) load in the signal that receives.
In certain embodiments, the different aspect (e.g., UE 115 and base station 105) of system 100 and/or 200 can by with It is set to using the Adaptive interference cancellation according to various embodiments.In certain embodiments, can be based on effectively negative for interference The configured transmission of load, to use the real-time determination of IC schemes.Can using configured transmission come calculate signal quality threshold (for example, SINR threshold values etc.), wherein when higher than the signal quality threshold, various IC schemes are likely to successful.For example, signal matter Amount threshold value can indicate a level, and at the horizontal place, the IC schemes (for example, CWIC etc.) based on error correcting code structure will likely It is successful.If selected for the IC schemes based on error correcting code structure, then the program can be monitored to determine that decoding is dry Disturb whether pay(useful) load will succeed.Measured if based on the degree of convergence associated with decoding interference transmission, based on error correcting code knot The IC of structure is rendered as being non-convergent, then can stop the IC based on error correcting code structure, and alternatively runs different IC schemes. For example, it can be included based on signal quality threshold come the other IC schemes used：Noiseless elimination, the space based on linear equalization AF panel or the interference cancellation scheme (for example, SLIC etc.) independently of coding structure.
In certain embodiments, it is determined that the order that IC schemes and/or execution eliminate for the interference of interference pay(useful) load It is middle to consider it is expected pay(useful) load and disturb the overlapping amount of the resource between pay(useful) load.For example, it may be possible to multiple interference signals are received, Wherein these signals are included from it is expected that pay(useful) load has the interference pay(useful) load of different resource overlaying horizontals.It can be based on overlapping Amount and processing constrain, to some or it is all interference pay(useful) load perform the IC based on error correcting code structure.In order to perform base In error correcting code structure IC and to disturbing the selection and sequence of pay(useful) load, may depend on interference pay(useful) load with it is expected it is effectively negative The overlapping amount of the resource of load or the overlapping amount of signal energy.In addition, selection and sequence depend on carrying out interference pay(useful) load The probability being successfully decoded.
When performing CWIC, the iterations for iterative decoding interference pay(useful) load can be dynamically selected.At some In embodiment, before decoder Complete Convergence, (for example, soft bit) can be exported using decoder and eliminated to perform interference. The optimization of decoding iteration can be the letter of the signal quality based on interference pay(useful) load, code check, residual interference, serving cell transmission Number quality and/or the external information as caused by decoder.In certain embodiments, an interference pay(useful) load can be directed to hold Row successive ignition decodes.The soft-decision output for the first stage can be stored, and using first on the subsequent stage The soft-decision of the storage in stage is exported to initialize iterative decoder.
Fig. 3 is the descending chain circuit frame for showing to use in wireless communication system (it includes wireless communication system 100) The schematic diagram of the example of structure 300.For example, in LTE/LTE-A or similar system, frame structure 300 can be used.It is each Individual frame structure 300 can have 10ms wireless frame length 310, and may include each 1ms 10 subframes 315.Each Subframe 315, which can also be further classified as length 0.5ms two time slots or half subframe, each of which time slot, to be included Six or seven symbols.OFDMA component carriers 320 can be depicted as to the resource grid for representing two time slots.It will can provide Source mesh generation is into multiple resource units 325.Each resource unit can carry modulated symbol.
In LTE/LTE-A, 12 continuous subcarriers that resource block 330 may be embodied in frequency domain, and for every For general cyclic prefix in one OFDM symbol, including 7 continuous OFDM symbols in the time domain, or 84 resources Unit.Some (it is indicated into R (for example, 335)) in resource unit can include DL reference signals (DL-RS).DL-RS can be with Including the RS (CRS) (it is also occasionally referred to as public RS) specific to the cell and RS (UE-RS) specific to UE.Only by accordingly The resource block (not shown) that be mapped to of physical downlink shared channel (PDSCH) 340 on send UE-RS.By each resource Amount of bits entrained by unit may depend on modulation scheme.Therefore, the resource block that UE is received is more, and modulation scheme exponent number is got over Height is then higher for the data rate of the UE.
As shown in Figure 3, PDCCH 345 is time-multiplexed generally with PDSCH 340, and is generally fully distributed in each In the whole bandwidth of component carrier 320 in the first area of subframe 315.In the example shown in figure 3, PDCCH 345 is accounted for According to first three symbol of subframe 315.Control information amount based on component carrier bandwidth and for subframe 315, PDCCH 345 can be with With more or less symbols (as long as being adapted to).Can be found in PDCCH 345 the first symbol PHICH and/or PCFICH channel (not shown)s.
PDCCH carries down link control information (DCI) in control channel unit (CCE).DCI is included on descending chain Road dispatching distribution, uplink resource allowance, transmission plan, up-link power control, hybrid automatic repeat-request (HARQ) The information and other information of information, modulation and encoding scheme (MCS).DCI can be specific for UE (special) or Specific to (public) of cell, and the different special and common search being placed on according to the form of the DCI in PDCCH are empty Between in.UE is referred to as the processing of blind decoding to attempt to decode DCI by performing, wherein during blind decoding, is searching for Perform multiple decodings in space to attempt, untill detecting DCI.
The size of DCI message can be different according to the type as the information entrained by the DCI and amount.If for example, branch Spatial reuse is held, then compared with carrying out the scene of cline frequency distribution, the size of DCI message is bigger.Similarly, for using For MIMO system, DCI will necessarily include without using MIMO system unwanted extra signaling information.Therefore, DCI It has been classified as be suitable for the different-format of different configurations.The size of DCI format depends not only on to be carried in the DCI message Information content, but also depending on such as quantity of transmission bandwidth, antenna port, TDD or FDD operator scheme etcs its Its factor.
It should be noted that in some systems, DCI message be also attached with CRC (CRC) bit for Error detection.Then, according to DCI format, by encoded DCI bit maps to control channel unit (CCE).PDCCH can be with Carry the DCI message associated with multiple user equipmenies.Therefore, specific user equipment, which must be capable of identify, is intended to be used for the spy Determine the DCI message of user equipment.Therefore, user equipment is allocated some identifiers (for example, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI Symbol-C-RNTI), these identifiers help to detect the DCI associated with the user equipment.In order to reduce signaling consumption, utilize The identifier (for example, C-RNTI) associated with specific user equipment and/or the identifier associated with one group of user equipment The CRC bits for being affixed to each DCI pay(useful) loads are scrambled (for example, mask).It is being referred to as the operation of " blind decoding " In, user equipment can be descrambled (or removing mask) using its unique identifier to all potential DCI message, and to DCI Pay(useful) load performs CRC check.If CRC check is by the way that the content for showing control channel is effective for the user equipment , the user equipment can then handle the DCI.
In order to reduce the power consumption and expense at user equipment, it is possible to specify control channel unit (CCE) position it is limited The set of set, wherein the CCE positions includes that the position of the DCI pay(useful) load associated with specific UE can be placed in this place Put.For example, CCE can by nine logically continuous resource unit group (REG) form, each of which REG include 4 money Source unit (RE).Each RE is a frequency time unit.Can be according to DCI format and system bandwidth, according to different water Flat (for example, 1,2,4 and 8) polymerize to CCE.User equipment can find the CCE positions of its corresponding DCI message wherein Set be regarded as search space.Can be by the search space partition into two domains：Public CCE domains or search space and spy Due to UE (special) CCE domains or search space.Public CCE domains are monitored by all UE serviced by eNodeB, and can With including such as paging information, system information, the information of random access procedure etc.Include spy specific to UE CCE domains Due to the control information of user, and it is individually arranged for each user equipment.CCE is continuously numbered, and Public search space with can be with the overlapping CCE of span specific to UE search space.Public search space is all the time from CCE 0 Begin, and specific to UE search space have dependent on UE ID (for example, C-RNTI), subframe index, CCE polywaters it is gentle its The starting CCE indexes of its random seed.
When using transmitting diversity to send data, multiple versions of same data can be sent over multiple channels.Can With according to one or more of time domain divide (for example, time slot), one or more of frequency domain division (for example, subcarrier), One or more of encoding domain division (for example, CDMA is encoded) or antenna/direction (for example, different antenna ports), come Define each channel in these channels.Therefore, using the exemplary frame structure 300 in Fig. 3, by using different resources Unit sends the different editions of data, it is possible to achieve transmitting diversity.However, it is also possible to by using identical resource unit and Different coding, antenna or direction sends the different editions of data, to realize transmitting diversity.Therefore, receive with frame Some resource units corresponding interference signals UE or base station can monitor different editions for same disturbance signal Other resource units.In addition, UE or base station can also monitor for the different editions of interference signal other encoded channels or The identical or different resource unit of person's directional channel.Therefore, interference transmission can include one from neighbor cell or Multiple interference transmission and/or the interference transmission from serving cell.If UE or base station determine to have used hair on interference signal Diversity is penetrated, then two or more versions received in version of the interference signal can be combined to estimate by UE or base station With the deletion interference signal.
Fig. 4 is the timing diagram 400 of the exemplary sequential of the transmission in the environment of showing for Fig. 2.In timing diagram 400, Come from PDSCH grant of resources 440-a and 440- that eNB 105-a serving cell transmission 225-a includes being directed to UE 115-a b.PDSCH grant of resources 440-a includes 8 RB during frame 310-a subframe 2, and PDSCH grant of resources 440-b includes 8 RB during frame 310-a subframe 3.Coming from eNB 105-c transmission 230-c-a includes being intended to be directed to other UE (examples Such as, UE 115-c etc.) PDSCH grant of resources 445-a, 445-b, 445-c and 445-d.Therefore, UE 115-a may be received To the equitant transmission 225-a of interference pay(useful) load 445-a, 445-b, 445-c and 445-d included with transmission 230-c-a The signal for it is expected pay(useful) load 440-a and 440-b.UE 115-a can using one or more advanced interference management techniques come Transmission 230-c-a is deleted, to realize being successfully decoded for transmission 225-a expectation pay(useful) load 440-a and 440-b.Such as timing diagram Shown in 400, UE 115-a can receive pay(useful) load (440-a or 440-b) in each subframe from serving cell.Cause This, IC and serving cell pay(useful) load 440-a and 440-b for disturbing pay(useful) load 445-a, 445-b, 445-c and 445-d Decoding, should use less than subframe time (for example, 1ms etc.) time, to prevent the team in received signal information The accumulation of symbol in row.
Fig. 5 is the block diagram according to the example system 500 for Adaptive interference cancellation of various embodiments.It can scheme System 500 is realized in 1 and/or Fig. 2 UE 115 and eNB 105.System 500 includes antenna 505, receiver 510, summing junction 515th, decoder module 520, CWIC modules 540, SLIC modules 545 and adaptive IC processors 550.Antenna 505 can receive Include the radiofrequency signal that 530 equitant one or more serving cell transmissions 525 are transmitted with one or more interference.Receive Machine 510 can receive and handle the signal (for example, being down-converted to base band, modulus (ADC) conversion, cyclic prefix removal, string and turning Change, Fast Fourier Transform (FFT) (FFT) etc.) to generate the signal 535 received, wherein the signal 535 received includes and institute Corresponding assemble of symbol is transmitted in reception.
Decoder module 520 can include being used for the element and circuit for decoding serving cell transmission 525.For example, Decoder module 520 can include the iterative decoder of such as turbo decoders etc.In addition, decoder module 520 can wrap Include for rebuilding the coding circuit by transmission symbol corresponding with decoded serving cell transmission.CWIC modules 540 can be with Including the element and circuit for being decoded to interference transmission.CWIC modules 540 can include being used to that connecing for transmission will to be disturbed The symbol received is decoded into the iterative decoder of the code word of interference pay(useful) load.In addition, CWIC modules 540 can include being used for root The encoder that interference symbol eliminates for interference is rebuild according to code word.In one embodiment, CWIC modules 540 include being used for Perform iterative decoding turbo decoders, and for according to decoded code word come rebuild interference transmission by transmission symbol Turbo encoder.In certain embodiments, decoder module 520 and CWIC modules 540 can be realized in individual module In, wherein the individual module performs serving cell pay(useful) load and disturbs the decoding and reconstruction of pay(useful) load.SLIC modules 545 can With including for estimating the interference bit corresponding with each symbol and the estimation of interference signal being rebuild using bit estimation Element and circuit.
Adaptive IC processors 550 can configure decoder module 520, CWIC modules 540 and SLIC modules 545 for Adaptive interference cancellation is performed using technique described below.Adaptive IC processors 550, which can use, to be used to use SLIC and/or CWIC come generate interference transmission 530 estimation interference signal 555 various technologies, wherein in summing junction 515 The interference signal 555 that place subtracts the estimation from the symbol received is divided so that interference is transmitted into 530 from desired transmission 525 From.Then, decoder module 520 can be handled desired transmission 525, to generate decoded user data 535.Connect The signal 535 received can be included in the symbol received on multiple transfer resources (for example, subcarrier, resource block etc.), with And summing junction 515 can be operated on single transfer resource.Passed for example, CWIC modules 540 can perform for interference Defeated 530 CWIC, the wherein interference transmission 530 can overlap with a part for the signal 535 received.In summing junction 515 Place can be directed to the lap of pay(useful) load, subtract the interference signal 555 for the estimation rebuild by CWIC modules 540.Can be with By system 500 using the part into HARQ technologies described above, to realize the Wrong control of desired transmission 525.
Fig. 6 shows the method 600 for being used to determine the IC schemes for interference transmission in real time according to various embodiments.For It is easy to for the sake of explanation, describes method 600 with reference to system 500 illustrated in fig. 5, wherein system 500 can be realized for example In eNB 105 and UE 115 shown in Fig. 1 and/or Fig. 2.For example, adaptive IC processors 550 can be on the uplink Application method 600 determines whether to perform CWIC, SLIC or do not perform interference to eliminate in real time to be directed to given interference transmission. However, method 600 can by using all other systems of the architecture of architecture etc as shown in Figure 14 and/or Equipment uses.
Method 600 may begin at square frame 605, wherein at square frame 605, reception includes serving cell transmission and interference passes Defeated signal (for example, signal 535).At square frame 610, adaptive IC processors 550 can determine the signal for receiving The configured transmission of interference pay(useful) load in 535.For example, can by from network receive configured transmission, blind decoding configured transmission, And/or the DCI information that decoding is associated with interference pay(useful) load, to identify configured transmission.What is identified is effectively negative for interference The configured transmission of load can include code check, modulation scheme, Space Program, order, transport block size, allocated PRB and/or redundancy Version.
At square frame 615, adaptive IC processors 550 can be calculated based on the configured transmission for interference pay(useful) load One or more threshold values for IC Scheme Choices.For example, threshold value can be for interference signal successful symbol detection or The received signal quality threshold value (for example, SINR etc.) of decoding.For example, adaptive IC processors 550 can use reception signal Modulation scheme, code check, Space Program and/or order and reception signal SINR between predetermined relation, to realize that interference has Effect load is successfully decoded.
At square frame 620, adaptive IC processors 550 can determine for interference transmission signal quality metrics (for example, SINR etc.).For example, adaptive IC processors 550 can be determined by measuring the reference signal associated with interference transmission Signal quality metrics, and decline and/or the transmission power ratio (TPR) of explainable interference transmission.
At square frame 625, adaptive IC processors 550 can be based on signal quality threshold and for disturbing the signal transmitted Quality metric, to determine IC schemes.For example, exceed the situation of the threshold value for interference transmission is successfully decoded in signal quality metrics Under, interference can be transmitted and perform CWIC to generate the interference signal for the estimation that can be subtracted from the signal 535 received 555.In the case where signal quality metrics are not above the threshold value for interference transmission is successfully decoded, can alternatively perform SLIC.In other examples, signal quality metrics and threshold value that adaptive IC processors can be transmitted based on interference, to determine Signal quality present in interference transmission is insufficient to be used to run SLIC, therefore can not perform IC to interference transmission.
In some instances, adaptive IC processors 550 can be the initial transmission of transmission block based on interference transmission, still The re-transmission of transmission block, to determine IC schemes.Retransmit can mainly on be parity information, and be not received by systematicness It is difficult to decode it in the case of information.Therefore, in the case of it is determined that interference pay(useful) load is re-transmission, adaptive IC processors 550 can perform SLIC rather than CWIC (has exceeded initial for being successfully decoded even in the SINR for disturbing pay(useful) load In the case of the threshold value of transmission).
Fig. 7 is shown according to various embodiments for determining the method 700 of IC schemes based on signal quality threshold.Example Such as, method 700 can be performed at the square frame 625 of method 600, so as to the signal based on signal quality threshold and for interference transmission Quality metric determines IC schemes.For the sake of description, system 500 shown in reference picture 5 describes method 700, Wherein system 500 can be realized in the eNB 105 and UE 115 shown in such as Fig. 1 and/or Fig. 2.However, method 700 It can be used by the other systems and/or equipment using all architectures of architecture etc as shown in Figure 14.
Method 700 may begin at square frame 710, wherein at square frame 710, can be by for the signal quality of interference signal Measurement is compared with being used to perform SLIC signal quality threshold.It is less than the signal for being used for performing SLIC in signal quality metrics In the case of quality threshold, adaptive IC processors 550 can be determined to perform at square frame 715 and transmitted for the interference IC.
At square frame 710, if signal quality metrics are more than the signal quality threshold for being used for performing SLIC, in square frame , can be by signal quality metrics compared with being used to perform CWIC signal quality threshold at 720.It is small in signal quality metrics In the case of the signal quality threshold for performing CWIC, adaptive IC processors 550 can perform at square frame 725 SLIC.At square frame 720, in the case where signal quality metrics are more than being used to perform CWIC signal quality threshold, adaptively IC processors 550 can transmit to interference at square frame 735 and perform CWIC.
Alternatively, method 700 can include square frame 730, wherein at square frame 730, interference transmission is had with serving cell The resource lap and anti-eclipse threshold for imitating load are compared.Show in the additional complexity that resource lap to run CWIC Obtain if necessary, method 700 returns to the execution SLIC at square frame 725.
Iteration to disturbing pay(useful) load in the case of performing CWIC, can performed based on the comparison with CWIC threshold values The degree of convergence monitoring of decoding, to determine whether decoding process can restrain.In some instances, due in the interference signal that receives Inadequate signal quality, decoding process possibly can not restrain.In other examples, because identification is effectively negative for interference The configured transmission of load is incorrect, and decoding process possibly can not restrain.For example, it is intended to the DCI for another user in UE decodings In the case of, UE may improperly explain DCI allowances.Therefore, the configured transmission identified may be with disturbing pay(useful) load Do not correspond to.Decoding process will not it is convergent in the case of, CWIC can be stopped, and alternatively operation is another for interference transmission IC schemes (for example, SLIC).
Fig. 8 is shown to be used to monitor to perform CWIC's using the degree of convergence for interference transmission according to various embodiments Method 800.For the sake of description, system 500 shown in reference picture 5 describes method 800, and wherein system 500 can To realize in the eNB 105 and UE 115 shown in such as Fig. 1 and/or Fig. 2.However, method 800 can such as be schemed by using The other systems and/or equipment of the architecture of architecture shown in 14 etc use.
Method 800 may begin at square frame 810, wherein at square frame 810, can perform iterative decoding.In square frame 815 Place, in predetermined time interval (for example, after each iteration etc.) place, degree of convergence measurement is monitored to determine pin Whether the iterative decoding of interference transmission may be restrained.Determine whether iterative decoding can restrain at square frame 815, can be base In the soft-decision output of the number and iterative decoder of the iteration of process.For example, can be to the logarithm based on decoded bit The external information of likelihood ratio (LLR) is monitored, and if external information does not indicate decoder in the iteration of some number Forward direction convergence movement, the then unlikely convergence of decoder.Between the value that square frame 815 can be measured based on iterations and the degree of convergence Predetermined relationship (wherein the predetermined relationship instruction iterative decoding be unlikely convergent), to monitor degree of convergence measurement.
If the unlikely convergence of iterative decoding, at square frame 820, adaptive IC processors 550 return to another kind Interference cancellation scheme (for example, SLIC etc.).Method 800 can continue to run until that iterative decoder is restrained at square frame 825 Untill, or untill it will not restrain indicated at square frame 815.
In some instances, multiple interference transmission are likely to be received, wherein these interference transmission have with serving cell transmission There is different degrees of resource overlapping.Fig. 9 is the timing diagram for showing the exemplary sequential for the transmission under the environment in Fig. 2 900.In timing diagram 900, coming from eNB 105-b serving cell transmission 225-b includes providing for UE 115-b PDSCH Permit 940-a and 940-b in source.PDSCH grant of resources 940-a includes 8 RB during frame 315-b subframe 2, and PDSCH Grant of resources 940-b includes 8 RB during frame 315-b subframe 3.Coming from eNB 105-a transmission 230-a-b includes purport In PDSCH the grant of resources 945-a and 945-b for other UE (for example, UE 115-a etc.).Come from eNB 105-c's Transmission 230-c-b include be intended to for other UE (for example, UE 115-c etc.) PDSCH grant of resources 950-a, 950-b and 950-c.Therefore, UE 115-b be likely to be received include with transmission 230-a-b and 230-c-b interference pay(useful) load 945-a, The equitant transmission 225-b of 945-b, 950-a, the 950-b and 950-c signal for it is expected pay(useful) load 940-a and 940-b.
According to the available process resource for being decoded to the signal received and time, UE115-b can be directed to Disturb one in pay(useful) load or until all interference pay(useful) loads, perform CWIC.In certain embodiments, UE 115-b Based on lap, overlapping signal energy and/or the probability that interference pay(useful) load is successfully decoded, to determine to have interference Effect load performs CWIC order.For example, as shown in Figure 9, interference pay(useful) load 945-a is with it is expected pay(useful) load 940-a weights 6 RB are folded, and disturb pay(useful) load 945-b, 950-a, 950-b and 950-c with it is expected that pay(useful) load 940-a difference is overlapping 2 RB, 2 RB, 4 RB and 2 RB.Therefore, UE 115-b can perform CWIC to interference pay(useful) load 945-a first, and be based on For completing, interference eliminates and decoding expects to have the pot life for imitating load to extra interference pay(useful) load to perform CWIC.
In certain embodiments, UE 115-b can be first pair with it is expected that pay(useful) load 940-a has the letter of Maximum overlap The pay(useful) load of number energy performs CWIC.For example, compared with transmitting 230-a-b, can receive has more high RST energy The transmission 230-c-b of (for example, higher SINR etc.).Therefore, compared with disturbing pay(useful) load 945-a, pay(useful) load is disturbed 950-b has higher overlapping signal energy (even if its overlapping less resource).Can be by considering to disturb pay(useful) load The TPR and/or the amplitude of fading on each RB in 945-a, 945-b, 950-a, 950-b and 950-c, to determine for each Disturb the overlapping energy of pay(useful) load.
In certain embodiments, UE 115-b are it is determined that in order of the interference pay(useful) load to perform CWIC, taking into account The probability that row is successfully decoded.For example, the pay(useful) load for overlapping with small number of resource may have higher decoding probability, and Therefore it can provide the relatively high likelihood that CWIC will produce beneficial result.Can based on interference transmission code check, modulation scheme, Space Program and order and signal quality, to determine the probability being successfully decoded.In certain embodiments, it is also contemplated that known Other allowance for interference pay(useful) load is incorrect possibility.It is for example, effective with the interference for its execution DCI decodings Load is compared, and can be given to the interference pay(useful) load received by network signal for its configured transmission and be performed CWIC's Priority.
Figure 10 shows the method for being used to determine the IC schemes for multiple interference transmission in real time according to various embodiments 1000.For the sake of description, system 500 shown in reference picture 5 describes method 1000, and wherein system 500 can be with Realize in the eNB105 and UE 115 shown in such as Fig. 1 and/or Fig. 2.For example, adaptive IC processors 550 can be Application method 1000 on downlink, to determine IC schemes and elimination order for multiple interference transmission in real time.However, Method 1000 can by the other systems and/or equipment using all architectures of architecture etc as shown in Figure 14 Lai Using.
Method 1000 may begin at square frame 1005, wherein at square frame 1005, reception includes serving cell pay(useful) load With the signal of interference pay(useful) load.At square frame 1010, adaptive IC processors 550 can be determined in the signal for receiving Interference pay(useful) load in some or all interference pay(useful) loads configured transmission.For example, can be by being received from network Configured transmission, blind decoding is carried out to configured transmission, and/or pair DCI information associated with interference pay(useful) load decodes, and comes Identify configured transmission.The configured transmission for interference pay(useful) load identified can include code check, modulation scheme, space side Case, order, transport block size, allocated PRB and/or redundancy versions.
At square frame 1015, adaptive IC processors 550 can determine to perform interference pay(useful) load CWIC order.Example Such as, IC processors can be successfully decoded general based on lap, overlapping signal energy, and/or to interference pay(useful) load Rate, to determine to perform interference pay(useful) load CWIC order.
, can be based on the order determined at square frame 1015 at square frame 1020, the interference for limit priority is effective Load to perform CWIC.It can be monitored using the degree of convergence to determine whether the iterative decoding for disturbing pay(useful) load is being restrained, with And if it is determined that iterative decoding can then stop CWIC not in convergence (being discussed as explained above with Fig. 8).
At square frame 1025, adaptive IC processors 550 may determine whether to perform extra interference pay(useful) load CWIC.Adaptive IC processors 550 can be based on lap, overlapping signal energy, and/or to extra interference pay(useful) load The probability being successfully decoded, to continue executing with the CWIC for extra interference pay(useful) load.For example, adaptive IC processors 550 can be to meeting to do for overlapping, the overlapping signal energy of resource or all of certain standard of the probability being successfully decoded Pay(useful) load is disturbed to perform CWIC.
Alternatively, after the interference pay(useful) load to some quantity performs CWIC, adaptive IC processors 550 can be At square frame 1030, SLIC is performed for the symbol of serving cell pay(useful) load.For example, can pair with without for its execution The CWIC equitant any symbol of interference pay(useful) load runs SLIC.
, can dynamic when according to for IC Scheme Choices described above and the various technologies of sequence to perform CWIC Ground selects the iterations for being iterated decoding to interference transmission, to optimize IC performances.For example, given do can be directed to Pay(useful) load is disturbed, to determine the iterations for iterative decoding, and after the iteration of the number, stops decoder.Even if In the case where decoder does not also have Complete Convergence, it is dry to perform (for example, soft decision bits) can also to be exported using decoder The interference for disturbing pay(useful) load eliminates.Although non-convergent decoder output can't be mistakenly not relative with by transmission code word Should, but when being redeveloped into by transmission symbol and being deleted from the signal received, it is still beneficial to decoding service cell Pay(useful) load.In certain embodiments, for decoding single subframe, serving cell pay(useful) load and each interference can be directed to Pay(useful) load, perform CWIC to the multistage.When performing the extra stage for interference pay(useful) load, subsequent rank can be directed to Soft-decisions of the Duan Liyong from previous stage is exported to initialize iterative decoder.
Figure 11 is to show the IC having to the dynamic select of the iteration for iterative decoding according to various embodiments Timing diagram 1100.Timing diagram 1100 depicts can perform to disturbing the IC of pay(useful) load and effective to serving cell by stages The decoding of load.As shown in Figure 11, perform for disturbing the IC of pay(useful) load and serving cell pay(useful) load being solved Code generally occurs in less than one subframe.Dynamic select iteration
1105 period in the first stage, can be to the first interference pay(useful) load IP1Perform CWIC., can in the stage 1105 To determine to be used for the iterations 1135 for performing CWIC.For example, iterations 1135 can be the letter based on interference pay(useful) load Number quality (for example, SINR), code check and/or modulation scheme.Furthermore, it is possible to the signal quality based on serving cell pay(useful) load And/or the residual interference of reception signal determines iterations.
Having run after the iteration of determined number, to disturbing pay(useful) load IP1Iterative decoding may not cause For the hard bit (convergent decoder output) for the code word for disturbing pay(useful) load.For example, Figure 11 is shown for interference effectively The degree of convergence of load is measured 1130 (for example, external informations based on LLR etc.) and indicated after the stage 1105, effective to disturbing The decoding of load is also without fully convergence (wherein, the degree of convergence is 1 instruction decoding Complete Convergence).Even if without receiving completely Hold back, can also be exported using the soft-decision of decoder to rebuild with disturbing pay(useful) load corresponding by the estimation of transmission symbol, And can be from time t1Rebuild symbol is deleted in the signal that place receives.Can self-demarking code in future device soft-decision it is defeated Go out to be stored.
In the stage 1110, can be based in order to disturbing pay(useful) load IP2It is right come the iterations for performing CWIC and determining Second interference pay(useful) load IP2To perform CWIC.After the iteration of the number has been run, pay(useful) load IP is disturbed2May not have It is fully decoded, as shown by degree of convergence measurement 1150.In time t2Place can be exported based on soft-decision to perform IC, this Outside, can store for interference pay(useful) load IP2Soft-decision output.
At the stage 1115, the CWIC that serving cell pay(useful) load performs the iteration for some number can be directed to. After having run the iteration of the number, serving cell pay(useful) load may be fully decoded, and such as measure 1160 by the degree of convergence Shown.In time t3Place can be had using the soft decision bits for serving cell pay(useful) load to rebuild with serving cell Effect loads the corresponding estimation by transmission symbol, the estimation can be subtracted from the signal received to perform to serving cell The deletion of pay(useful) load.The soft decision bits for serving cell pay(useful) load after stage 1115 can be stored.
At the stage 1120, interference pay(useful) load IP can be directed to1Performed for the 2nd CWIC stages.In embodiment, utilize The soft-decision in the first CWIC stages stored at the stage 1105 is exported to initialize iterative decoder.By what is stored soft sentences Certainly output can represent the LLR of the partial convergence for iterative decoding, it is thus possible to reduce during the stage 1120 for interference Pay(useful) load IP1Decoding iterations.Partly deleting the second interference pay(useful) load IP2With serving cell pay(useful) load (based on it is non-convergent decoding be deleted) in the case of, at the stage 1120 the 2nd CWIC stages can fully restrain and It can generate for interference pay(useful) load IP1Code word hard bit.At time t4, can use to come from interference effectively negative Carry IP1The hard bit being successfully decoded, be directed to interference pay(useful) load IP to perform1IC.
Exported by using convergent decoder to be directed to interference pay(useful) load IP1The CWIC of execution and use part are received The decoder held back is exported to be directed to interference pay(useful) load IP2The CWIC of execution, it can be performed at the stage 1125 to serving cell The decoding of pay(useful) load.If the decoding to serving cell pay(useful) load is completed in the everywhere convergent of stage 1125, decoding process, and Other IC need not be run.If the decoding to serving cell pay(useful) load does not restrain at the stage 1125, can hold Row is to disturbing pay(useful) load IP1, interference pay(useful) load IP2With the other IC stages of serving cell pay(useful) load.
Figure 12 is shown is used for the IC with the dynamic select to the iteration for iterative decoding according to various embodiments Method 1200.For the sake of description, system 500 shown in reference picture 5 describes method 1200, wherein system 500 can realize in eNB 105 and UE 115 shown in such as Fig. 1 and/or Fig. 2.However, method 1200 can be by using The other systems and/or equipment of all architectures of architecture etc as shown in Figure 15 use.
Method 1200 may begin at square frame 1205, wherein at square frame 1205, reception includes serving cell pay(useful) load With the signal (for example, signal 535) of interference pay(useful) load.At square frame 1210, it can determine to be used for hold based on iterative parameter Iterations of the hand-manipulating of needle to IC iterative decoding.For example, iterative parameter can include the signal quality (example of interference pay(useful) load Such as, SINR), code check and/or modulation scheme, the signal quality of serving cell pay(useful) load, processing limitation, subframe and during decoding The residual interference of sequence, the BER of decoded pay(useful) load and/or received signal.In some instances, may be used So that before operation decodes, iterations is predefined based on iterative parameter.In other examples, iterative parameter can be with adaptive Should ground determination iterations.For example, iterative decoding can be performed, until reaching some BER, (it can be by outside Information is monitored approximate, etc.) untill, and BER can be determined based on one or more iterative parameters.
Processing limitation can illustrate perform iterative decoding power consumption, and can be based on remaining battery life amount or Other power measurements.It is secondary that subframe and decoding sequential can contemplate the iteration needed for decoding service cell pay(useful) load institute typical case Number (for example, based on modulation and encoding scheme, SINR etc.).For example, the iterative decoding to interference transmission, Zhi Daoji can be performed Quantity in the interference transmission for performing CWIC or the time quantum for decoding service cell pay(useful) load it is predetermined when Between untill section.The amount for the data that predetermined time period can illustrate to be decoded or receive signal queue (for example, Whether more signal for receiving, etc. is had in the signal queue received).
, can be to the iterative decoding of iterations determined by interference pay(useful) load execution at square frame 1215.Running After the iteration of complete institute's determined number, the code word for disturbing pay(useful) load may not be caused to the iterative decoding for disturbing pay(useful) load Hard bit (convergent decoder output).
Figure 13 is shown to be used for the dynamic select to the iteration for iterative decoding according to various embodiments CWIC method 1300.For the sake of description, system 500 shown in reference picture 5 describes method 1300, wherein being System 500 can be realized in eNB 105 and UE 115 shown in such as Fig. 1 and/or Fig. 2.However, method 1300 can be by making Used with the other systems and/or equipment of all architectures of architecture etc as shown in Figure 16.
Method 1300 may begin at square frame 1305, wherein at square frame 1305, reception includes serving cell pay(useful) load With the signal (for example, signal 535) of interference pay(useful) load.At square frame 1310, interference pay(useful) load can be directed to and perform iteration Decoding.At square frame 1315, adaptive IC processors 550 may determine whether to terminate the solution of the CWIC for interference pay(useful) load The code stage.The predetermined water for degree of convergence measurement (for example, LLR external information based on iterative decoding, etc.) can be based on Put down to terminate decoding stage.For example, iterative decoding can be performed, the bit in decoded code word is indicated until degree of convergence measurement Untill error rate has reached the level that can be advantageous to CWIC.Additionally or alternatively, can the iteration based on pre-determined number come Terminate decoding stage.
At square frame 1320, the non-convergent soft-decision output of decoding stage can be produced and stored by iterative decoder. At square frame 1325, non-convergent interference can be based on and transmit soft-decision output, to generate the encoded interference transmission of estimation. At square frame 1330, estimated encoded interference transmission can be deleted from the signal received.
At square frame 1335, other interference pay(useful) loads or serving cell pay(useful) load can be directed to, perform other IC Operation.For example, other interference pay(useful) loads or serving cell pay(useful) load can be directed to, CWIC is performed.At square frame 1340, The decoder being initialised based on the non-convergent soft-decision output stored can be utilized to perform the volume to disturbing pay(useful) load Outer iterative decoding.
Figure 14 shows the equipment 1400 for being used to determine the IC schemes for interference transmission in real time according to various embodiments. For example, equipment 1400 can be with the UE 115 or eNB 105 aspect shown in depiction 1 and/or Fig. 2.Equipment 1400 can be with It is the example of adaptive IC processors 550.Equipment 1400 can include configured transmission identification module 1410, signal quality IC threshold values Module 1420, signal quality metrics module 1430 and IC scheme evaluations module 1450.Each part in these parts can be with Communicated each other.
Configured transmission identification module 1410 can identify the transmission ginseng of the interference pay(useful) load in the signal for being directed to and receiving Number.For example, can be associated with interference transmission by receiving configured transmission, blind decoding configured transmission and/or decoding from network DCI information, to identify configured transmission.The configured transmission for interference transmission identified can include code check, modulation scheme, sky Between scheme, order, transport block size, allocated PRB and/or redundancy versions.
Signal quality IC threshold modules 1420 can determine to be directed to IC based on the configured transmission for interference pay(useful) load One or more threshold values of Scheme Choice.For example, threshold value can be the successful symbol detection or solution for interference pay(useful) load The received signal quality threshold value (e.g., SINR etc.) of code.
Signal quality metrics module 1430 can determine signal quality metrics (e.g., SINR etc. for interference pay(useful) load Deng).For example, signal quality metrics module 1430 can determine signal by measuring the reference signal associated with interference transmission Quality metric, and decline and/or the transmission power ratio (TPR) of explainable interference pay(useful) load.
The signal quality metrics that IC scheme evaluations module 1450 can be transmitted based on signal quality threshold and for interference, come Determine IC schemes.For example, in the case where signal quality metrics exceed the threshold value for interference transmission is successfully decoded, can be to dry Disturb transmission and perform CWIC to generate the estimation of the reconstruction of interference symbol, estimating of being rebuild can be subtracted from the signal received Meter.Otherwise, SLIC or certain other IC scheme can be performed.
In certain embodiments, equipment 1400 includes the overlapping evaluation module 1440 of resource, and it is effectively negative that it can compare interference Carry the amount overlapping with the resource of serving cell pay(useful) load.Show in the additional complexity that the overlapping amount of resource to run CWIC Obtain if necessary, the overlapping evaluation module 1440 of resource can indicate alternatively perform SLIC or certain other IC side Case.
In certain embodiments, equipment 1400 includes degree of convergence monitoring modular 1460.When running CWIC, degree of convergence monitoring Module 1460 is monitored to degree of convergence measurement 1465, to determine whether may restrain for the iterative decoding of interference transmission. Determine iterative decoding whether can restrain can be based on the iteration of process number and iterative decoder soft-decision output.For example, The degree of convergence measures 1465 log-likelihood ratios (LLR) that can be based on decoded bit.If the degree of convergence is measured in a certain number Iteration in do not indicate the positive convergence movement of decoder, the then unlikely convergence of decoder.
Figure 15 is shown to be used for the dynamic select to the iteration for iterative decoding according to various embodiments CWIC equipment 1500.For example, equipment 1500 can be with the UE 115 shown in depiction 1 and/or Fig. 2 or eNB 105 side Face.Equipment 1500 can be the example of adaptive IC processors 550.Equipment 1500 can include soft-decision output memory module 1510th, CWIC iterative decodings optimization module 1520 and CWIC decoder initializations module 1530.Each portion in these parts Part can be communicated each other.
CWIC iterative decodings optimization module 1520 can determine to be used for perform effectively negative for interference based on iterative parameter The iterations of the CWIC of load iterative decoding.For example, iterative parameter can include the signal quality (example of interference pay(useful) load Such as, SINR), the remnants of code check and/or modulation scheme, the signal quality of serving cell pay(useful) load and/or the signal received Interference.The CWIC that decoding stage performs the iteration for institute's determined number can be directed to, and can be exported and stored by soft-decision Module 1510 exports to store the non-convergent soft-decision of iterative decoder.For for disturbing the subsequent CWIC of pay(useful) load to grasp Make, CWIC decoder initializations module 1530 can use the non-convergent soft-decision stored to export to initialize iterative solution Code.
Figure 16 is the block diagram for the system 1600 for including base station 105-d and mobile device 115-d.The system 1600 can be figure The example of the aspect of 1 system 100 and/or Fig. 2 system 200.Base station 105-d can be equipped with antenna 1634-a to 1634- X, and mobile device 115-d can be equipped with antenna 1652-a to 1652-n.Multiple component carriers can carry mobile device Up-link and downlink transmission between 115-d and base station 105-d.
At the 105-d of base station, data can be received from data source and/or processor 1640 by sending processor 1620.Storage Device 1642 can be coupled with processor 1640.Sending processor 1620 can be handled data.Send processor 1620 Reference symbol and the reference signal specific to cell can also be generated.Sending (TX) MIMO processor 1630 can be to data symbols Number, controlling symbols and/or reference symbol (if applicable) perform spatial manipulation (for example, precoding), and can be adjusted to sending Device 1632-a to 1632-x processed provides output symbol stream.Each modulator 1632 can handle corresponding output symbol stream (example Such as, for OFDM etc.), to obtain output sample streams.Each modulator 1632 can also be handled further (for example, being converted into Analog signal, amplification, filtering and up-conversion) output sample streams, to obtain downlink (DL) signal.In one example, come Automodulation device 1632-a to 1632-x DL signals can be launched via antenna 1634-a to 1634-x respectively.
Processor 1640 can be coupled with adaptive IC processors 1645.Adaptive IC processors 1645 can be configured To perform the real-time determination for the IC schemes for being directed to interference pay(useful) load based on the configured transmission associated with interference pay(useful) load. Signal quality threshold (for example, SINR threshold values etc.) can be calculated using configured transmission, wherein the signal quality threshold it On, for disturbing the CWIC of pay(useful) load to be likely to success.When performing CWIC, adaptive IC processors 1645 can monitor receipts Degree of holding back is measured, to determine to decode whether interference pay(useful) load can succeed.If do not restrained, CWIC can be stopped, and substitute Run different IC schemes in ground.Adaptive IC processors 1645 can be it is determined that IC schemes and/or execution be effectively negative for interference Consider it is expected that the resource between the pay(useful) load in pay(useful) load and interference pay(useful) load is overlapping in the order that the interference of load eliminates Amount.When performing CWIC, adaptive IC processors 1645 can be dynamically determined based on iterative parameter for effective to disturbing Load is iterated the iterations of decoding.When performing multiple CWIC for interference pay(useful) load, can store for the The soft-decision output in one stage, and the soft-decision stored on the subsequent stage using the first stage is exported to initialize iteration Decoder.
At mobile device 115-d, mobile device antenna 1652-a to 1652-n can receive DL signals, and will connect respectively The signal received is supplied to demodulator 1654-a to 1654-n.Each demodulator 1654 can adjust (for example, filtering, amplification, Down coversion and digitlization) signal that receives accordingly, to obtain input sample.Each demodulator 1654 can also be further Input sample (for example, for OFDM etc.) is handled, to obtain the symbol received.MIMO detectors 1656 can be from all demodulation Device 1654-a to 1654-n obtains the symbol received, and the semiology analysis MIMO received is detected (if applicable), and The symbol detected is provided.Reception processing device 1658 can handle the symbol that (for example, demodulation, deinterleaving and decoding) detects, The decoded data for mobile device 115-d are provided to data output, and to processor 1680 or memory 1682 Decoded control information is provided.
Adaptive IC processors 1685 may be coupled to processor 1680.Adaptive IC processors 1685 can be configured as The real-time determination for the IC schemes for being directed to interference pay(useful) load is performed based on the configured transmission associated with interference pay(useful) load.Can To calculate signal quality threshold (for example, SINR threshold values etc.) using configured transmission, wherein on the signal quality threshold, For disturbing the CWIC of pay(useful) load to be likely to success.When performing CWIC, adaptive IC processors 1685 can monitor convergence Degree measurement, to determine to decode whether interference pay(useful) load can succeed.If do not restrained, CWIC can be stopped, and alternatively Run different IC schemes.Adaptive IC processors 1685 can be it is determined that IC schemes and/or execution be directed to interference pay(useful) load Interference eliminate order in consider it is expected pay(useful) load and disturb pay(useful) load in pay(useful) load between resource it is overlapping Amount.When performing CWIC, adaptive IC processors 1685 can be dynamically determined based on iterative parameter for effectively negative to disturbing It is loaded into the iterations of row iteration decoding.When performing multiple CWIC for interference pay(useful) load, can store for first The soft-decision output in stage, and the soft-decision stored on the subsequent stage using the first stage is exported to initialize iterative solution Code device.
In up-link (UL), at mobile device 115-d, sending processor 1664 can be from data sources number According to, and the data are handled.In addition, transmission processor 1664 can generate the reference symbol for reference signal.Come from Precoding (if applicable) can be carried out by transmission MIMO processor 1666 by sending the symbol of processor 1664, by demodulator (for example, for SC-FDMA etc.) is further processed in 1654-a to 1654-n, and according to the biography received from base station 105-d Defeated parameter is sent back to base station 105-d.At the 105-d of base station, the UL signals from mobile device 115-d can be by antenna 1634 Received, handled by demodulator 1632, (if applicable) is detected by MIMO detectors 1636, and by connecing Processor 1638 is received to be further processed.Reception processing device 1638 can provide decoded to data output and processor 1640 Data.
Figure 17 is the block diagram according to the mobile device 115-d for being arranged to Adaptive interference cancellation of various embodiments 1700.Mobile device 115-d can have any one in various configurations, such as personal computer (e.g., calculating on knee Machine, netbook computer, tablet PC etc.), cell phone, PDA, smart phone, digital VTR (DVR), internet Instrument, game console, electronic reader etc..Mobile device 115-d can have the inside electricity of such as compact battery etc Source (not shown), to contribute to moving operation.In certain embodiments, mobile device 115-d can be Fig. 1 and/or Fig. 2 In mobile device 115.
Generally, mobile device 115-d can include the part to be communicated for double-directional speech and data, and it includes being used to send The part of communication and the component for receiving communication.Mobile device 115-d can include transceiver module 1710, antenna 1705, Memory 1780 and processor module 1770, these parts can (for example, via one or more buses) directly with one another Or communicate indirectly.As described above, transceiver module 1710 is configured as via antenna 1705 and/or one or more wired Or Radio Link, carry out two-way communication with one or more networks.For example, transceiver module 1710 can be configured as and including ENB 105 access point carries out two-way communication.Transceiver module 1710 can include modem, and it is configured as to packet It is modulated and is supplied to antenna 1705 to be transmitted modulated packet, and point to being received from antenna 1705 Group is demodulated.Although mobile device 115-d can include individual antenna 1705, mobile device 115-a can have can Simultaneously send and/or receive multiple plurality of antennas 1705 being wirelessly transferred.Transceiver module 1710 can be via multiple components Carrier wave is simultaneously communicated with multiple eNB 105.
Memory 1780 can include random access memory (RAM) and read-only storage (ROM).Memory 1780 can be with Computer-readable code of the storage comprising instruction, computer can perform software/firmware code 1785, and wherein these instructions are configured For：Upon being performed, processor module 1770 is made to perform various functions described herein (for example, call treatment, data depositary management Reason, the capture of neighbor cell signal etc. of network assistance).Or software/firmware code 1785 can not be by processor module 1770 directly perform, and being configured as (for example, when being compiled and performing to it) makes computer execution described herein Function.
Processor module 1770 can include intelligent hardware devices, for example, such as byCompany or The CPU of the CPU (CPU) of manufacture etc, microcontroller, application specific integrated circuit (ASIC) etc..Mobile device 115- D can include speech coder (not shown), and it is configured as receiving audio via microphone, convert the audio into expression and connect The packet (for example, length 20ms, length 30ms etc.) of the audio received, audio packet is provided to transceiver module 1710, with And provide the instruction whether user is talking.
According to Figure 17 architecture, mobile device 115-d can also include communication management module 1760, handover module 1765 and adaptive IC processors 550-a.For example, these modules can be mobile device 115-d part, and it is via total Line is communicated with some or all parts in mobile device 115-d other parts.Alternatively, can be by these modules Function be implemented as the part of transceiver module 1710, be implemented as computer program product, and/or be implemented as processor module 1770 one or more controller components.
In certain embodiments, handover module 1765 can be used for performing mobile device 115-d from an eNB 105 to another One eNB handoff procedure.For example, handover module 1765 can perform mobile device 115-d from a base station to another base The handoff procedure stood, wherein, voice and/or data communication are just received from these base stations.
Mobile device 115-d can be configured as performing Adaptive interference cancellation as described above.For mobile device 115-d part can be configured as realizing above with reference to Fig. 1 or Fig. 2 UE 115 and/or Figure 14 or Figure 15 equipment 1400 And/or 1500 aspect discussed.For example, adaptive IC processors 550-a can be Fig. 5 adaptive IC processors 550 or The example of person Figure 14 or Figure 15 equipment 1400 and/or 1500.
Figure 18 shows the frame of the communication system 1800 for being arranged to Adaptive interference cancellation according to various embodiments Figure.The system 1800 can be the example of the aspect of the system 100 or system 200 described in Fig. 1 or Fig. 2.System 1800 is wrapped Include the base station 105-d for being arranged to be communicated with UE115 on wireless communication link 125.
In some cases, base station 105-e can have one or more wired backhauls.For example, base station 105-e can With with the wired backhaul (for example, S1 interfaces etc.) for going to core net 130-a.In addition, base station 105-e can be via base Other eNB 105 of interior communication link (for example, X2 interface etc.) and such as base station 105-m and base station 105-n etc are carried out Communication.Each in base station 105 can use different wireless communication technology (such as, different wireless access technology) and UE 115 are communicated.In some cases, base station 105-e can use base station communication module 1815 and such as base station 105-m and/ Or base station 105-n etc other base stations are communicated.In certain embodiments, base station communication module 1815 can provide LTE/ X2 interface in LTE-A cordless communication network technologies, to provide the communication between some in base station 105,135.In some realities Apply in example, base station 105-e can be communicated by core net 130-a with other base stations.In some cases, base station 105-e It can be communicated by network communication module 1865 with core net 130-a.
Part for base station 105-e can be configured as realize above with reference to Fig. 1, Fig. 2 or Figure 16 base station 105 and/ Or the aspect that Figure 14 or Figure 15 equipment 1400 and/or 1500 is discussed, and for brevity, weight is not carried out here It is multiple.For example, adaptive IC processors 550-b can be the equipment of Fig. 5 adaptive IC processors 550 or Figure 14 or Figure 15 1400 and/or 1500 example.
Base station 105-e can include antenna 1845, transceiver module 1850, memory 1870 and processor module 1860, These parts can directly or indirectly be communicated between (for example, in bus system 1880).Transceiver module 1850 can be configured as carrying out two-way communication via antenna 1845 and UE 115 (it can be multi-modal device).In addition, receive Hair machine module 1850 (and/or base station 105-e other parts) can be configured as via antenna 1845 with it is one or more its Its base station (not shown) carries out two-way communication.Transceiver module 1850 can include modem, and it is configured as to dividing Group is modulated and is supplied to antenna 1845 to be transmitted modulated packet, and point to being received from antenna 1845 Group is demodulated.Base station 105-e can include multiple transceiver modules 1850, each transceiver module 1850 have one pair or Overpay associated antenna 1845.
Memory 1870 can include random access memory (RAM) and read-only storage (ROM).Memory 1870 may be used also To store the computer-readable code comprising instruction, computer-executable software code 1875, wherein these instructions are configured as： Upon being performed, make processor module 1860 perform various functions described herein (for example, call treatment, data base administration, Auxiliary information and/or interference eliminate generation of information etc.).Or software 1875 can not be direct by processor module 1860 Perform, and being configured as (for example, when being compiled and performing to it) makes computer perform functionality described herein.
Processor module 1860 can include intelligent hardware devices, for example, such as byCompany or The CPU of the CPU (CPU) of manufacture etc, microcontroller, application specific integrated circuit (ASIC) etc..Processor module 1860 can include various special purpose processors, for example, encoder, queue processing module, BBP, Radio heads Controller, digital signal processor (DSP) etc..
According to Figure 18 architecture, base station 105-e can also include communication management module 1830.Communication management module 1830 can manage the communication with other eNB 105.Communication management module can include controller and/or scheduler, so as to Other eNB 105 are collaboratively controlled and UE 115 communication.It is directed to and UE 115 for example, communication management module 1830 can perform Transmission scheduling, and/or various interference mitigation technologies (such as beam forming and/or joint transmission).
Either the part in 1500, UE 115 or base station 105 can respectively or jointly use one to equipment 1400 Individual or multiple application specific integrated circuits (ASIC) realize, wherein these ASIC be adapted for carrying out in hardware can be in application function It is some or all.Alternatively, these functions can be by one or more of the other processing list on one or more integrated circuits First (or kernel) performs.In other embodiments, other types of integrated circuit can be used (for example, structured/platform ASIC, field programmable gate array (FPGA) and other semi-custom IC), wherein these integrated circuits can be with known in the art Any mode is programmed.In addition it is possible to use instruct wholly or partially to realize the function of each unit, wherein These instructions perform comprising in memory, being formatted into by one or more universal or special processors.
The embodiment illustrated above in conjunction with accompanying drawing describes some exemplary embodiments, but it is not offered as only may be used To realize these embodiments, do not indicate that only these embodiments are just fallen within the scope of claims yet.Make through specification The word of term " exemplary " one means " being used as example, illustration or explanation ", but is not meant to " more excellent than other embodiments Choosing " or " more advantage ".For the thorough understanding of technology described by offer, embodiment includes specific detail.However, can To realize these technologies in the case of without using these specific details.In some instances, in order to avoid to described reality The concept for applying example causes to obscure, and show in block form known structure and equipment.
Information and signal can be represented using any one in a variety of different technologies and method.For example, it can pass through Wearing the data being mentioned in above description, instruction, order, information, signal, bit, symbol and chip can be by voltage, electricity Stream, electromagnetic wave, magnetic field or particle, light field or particle or its any combination represent.
The general processor, digital signal processor (DSP), special collection for being designed to perform function described herein can be used Into circuit (ASIC), field programmable gate array (FPGA) or other PLDs, discrete gate or transistor logic Device, discrete hardware components or its any combination, to realize or perform the various examples for combining disclosure herein disclosed description Property frame and module.General processor can be microprocessor, or, the processor can also be any conventional processor, control Device, microcontroller or state machine processed.Processor can also be implemented as the combination of computing device, for example, DSP and microprocessor Combine, some microprocessors, the one or more microprocessors combined with DSP core, or any other such structure.
Function described herein can be realized with the mode of hardware, software/firmware or its combination.When with software/firmware When realizing, these functions can be stored on a computer-readable medium, or as one on computer-readable medium or Multiple instruction or code are transmitted.Other examples and realization also fall into present disclosure and its scope of the appended claims Within spirit.For example, due to the essence of software/firmware, function described above can be used by such as computing device Software/firmware, hardware, hard wires or its combination realize.For realizing that the feature of function can also physically be distributed In each opening position, it includes being distributed so that realizing the part of function in different physical locations.
Computer-readable medium includes both computer-readable storage medium and communication media, wherein communication media include being easy to from Any medium of computer program is transmitted to another place in one place.Storage medium can be can be by universal or special calculating Any usable medium of machine access.For example, but it is non-make limitation, computer-readable medium can include RAM, ROM, EEPROM, CD-ROM or other disk storage, magnetic disk storage or other magnetic storage apparatus or it can be used in carrying or deposit Desired program code unit of the storage with instruction or data structure form simultaneously can be by universal or special computer or general Or application specific processor enters any other medium of line access.Furthermore, it is possible to any connection is properly called computer-readable Jie Matter.For example, if software/firmware be using coaxial cable, optical fiber cable, twisted-pair feeder, digital subscriber line (DSL) or The wireless technology of such as infrared ray, wireless and microwave etc, from the transmission of website, server or other remote sources, then described The wireless technology of coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, wireless and microwave etc is included in institute Give an account of in the definition of matter.As it is used herein, disk (disk) and CD (disc) include compact disk (CD), laser disk, light Disk, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disk generally magnetically replicate data, and CD then with laser come Optically replicate data.Combinations of the above is also included within the scope of computer-readable medium.
Description of the above around present disclosure is provided so that those of ordinary skill in the art can implement or use Present disclosure.To those skilled in the art, various modifications are carried out to present disclosure to would is that obviously , also, the overall principle defined herein can also be applied on the basis of the spirit or scope of present disclosure are not departed from Other modifications.Through term " example " either " exemplary " the instruction example or example of present disclosure, rather than it is implicit or Person is required for any preferred of stated example.Therefore, present disclosure is not limited to example described herein and set Meter scheme, and it is to fit to the maximum magnitude consistent with principles disclosed herein and novel features.

Claims (19)

1. a kind of method for performing Adaptive interference cancellation, including：
Receiving includes the signal of serving cell transmission and one or more interference transmission；
Configured transmission of the identification for the first interference transmission in one or more of interference transmission；
Between the interference pay(useful) load for it is expected pay(useful) load and the first interference transmission for determining the serving cell transmission The overlapping amount of resource；And
It is based at least partially on the overlapping amount of identified resource, signal quality threshold and disturbs transmission associated with described first Signal quality metrics, it is determined that for described first interference transmission interference cancellation scheme, wherein, the signal quality threshold is It is based at least partially on identified configured transmission.
2. according to the method for claim 1, wherein, one or more of interference transmission include one in the following It is or multinomial：The adjacent cell transmission of interference or the serving cell transmission of interference.
3. according to the method for claim 1, wherein, the signal quality threshold includes Signal to Interference plus Noise Ratio (SINR) threshold value, and wherein, the signal quality metrics include the SINR of the described first interference transmission.
4. according to the method for claim 1, wherein, the interference cancellation scheme includes one or more in the following ：Space AF panel based on linear equalization, the interference cancellation scheme based on error correcting code structure or independently of coding structure Interference cancellation scheme or its combination.
5. the method according to claim 11, in addition to：
The signal quality metrics based on the described first interference transmission exceed the signal quality threshold, perform and are directed to described the The codeword level interference of one interference transmission eliminates (CWIC).
6. according to the method for claim 5, wherein, the CWIC performed for the described first interference transmission includes：
Perform the iterative decoding to the described first interference transmission；
Monitor the degree of convergence measurement of the iterative decoding；
The iterations of the degree of convergence measurement and the iterative decoding is based at least partially on, determines that the degree of convergence is estimated；And
When degree of convergence estimation indicates the iterative decoding not in convergence, stop the CWIC of the first interference transmission.
7. the method according to claim 11, in addition to：
After CWIC is stopped, the symbol rank interference performed for the described first interference transmission eliminates (SLIC).
8. the method according to claim 11, in addition to：
The signal quality metrics based on the described first interference transmission are not above the signal quality threshold, and execution is directed to institute The symbol rank interference for stating the first interference transmission eliminates (SLIC).
9. the method according to claim 11, in addition to：
The signal quality metrics based on the described first interference transmission are not above secondary signal quality threshold, do not perform and are directed to The interference of the first interference transmission eliminates.
10. according to the method for claim 1, wherein, the identification is for the described first transmission ginseng for disturbing transmission Number includes at least one in the following：
The configured transmission being intended in the control message for the UE is received at user equipment (UE) place；Or
Pair with described first interference transmission it is associated down link control information (DCI) progress blind decoding.
11. according to the method for claim 1, wherein, the configured transmission includes one or more in the following：Institute State the code check of the first interference transmission, the Space Program of the first interference transmission, the biography associated with the described first interference transmission Defeated order, the transport block size of the first interference transmission, the redundancy versions of the first interference transmission or its combination.
12. the method according to claim 11, in addition to：
Detect the second interference transmission in one or more of interference transmission；
It is determined that for performing the order that interference eliminates for the described first interference transmission and the described second interference transmission；And
Based on identified order, for one in the described first interference transmission or the second interference transmission come actuating code The interference of word rank eliminates (CWIC).
13. according to the method for claim 12, wherein, it is described to determine to be used for for the described first interference transmission and described the Two interference transmission include to perform the order that interference eliminates：
Determine the first interference transmission and the first overlapped resource amount of the serving cell transmission；
Determine the second interference transmission and the second overlapped resource amount of the serving cell transmission；And
By the first overlapped resource amount compared with the second overlapped resource amount.
14. according to the method for claim 12, wherein, it is described to determine to be used for for the described first interference transmission and described the Two interference transmission include to perform the order that interference eliminates：
Determine the first interference transmission and the first amount of the overlapped signal energy of the serving cell transmission；
Determine the second interference transmission and the second amount of the overlapped signal energy of the serving cell transmission；And
By the first amount of the overlapped signal energy compared with the second amount of the overlapped signal energy.
15. according to the method for claim 12, wherein, it is described to determine to be used for for the described first interference transmission and described the It is dry to the described first interference transmission and described second based on estimation that the order eliminated to perform interference is transmitted in two interference Disturb the probability that transmission is successfully decoded.
16. according to the method for claim 12, wherein, the execution CWIC corresponds to the resource of the serving cell transmission A part, methods described also includes：
Different interference cancellation schemes is performed to the remainder of the resource of the serving cell transmission.
17. a kind of device for being used to perform Adaptive interference cancellation, including：
For receiving the unit for the signal for including serving cell transmission and one or more interference transmission；
For identifying the unit of the configured transmission for the first interference transmission in one or more of interference transmission；
For determine the serving cell transmission it is expected pay(useful) load and it is described first interference transmission interference pay(useful) load it Between the overlapping amount of resource unit；And
For being based at least partially on the overlapping amount of identified resource, signal quality threshold and transmitting phase with the described first interference The signal quality metrics of association, it is determined that the unit of the interference cancellation scheme for the described first interference transmission, wherein, the signal Quality threshold is at least partially based on identified configured transmission, and wherein, one or more of interference transmission include It is one or more in the following：The adjacent cell transmission of interference or the serving cell transmission of interference.
18. device according to claim 17, in addition to：
Exceed the signal quality threshold for the signal quality metrics based on the described first interference transmission, execution is directed to institute The codeword level interference for stating the first interference transmission eliminates the unit of (CWIC)；
For performing the unit of the iterative decoding to the described first interference transmission；
The unit that the degree of convergence for monitoring the iterative decoding is measured；
For being based at least partially on the iterations of the degree of convergence measurement and the iterative decoding, degree of convergence estimation is determined Unit；And
For when degree of convergence estimation indicates the iterative decoding not in convergence, stopping the first interference transmission CWIC unit.
19. device according to claim 17, in addition to：
The signal quality threshold is not above for the signal quality metrics based on the described first interference transmission, performs pin Symbol rank interference to the described first interference transmission eliminates the unit of (SLIC).
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